Backpack corrections and updates for file validation

- Replaced std::set with std::vector for sequence handling.
- Added randomization of sequences to avoid ordered input bias.
- Removed unused balance function and related code in bst.cpp and bst.h.
- Fixed bugs in list insertion and search logic.
- Updated plot.py to allow custom y-axis labels and enable log scale for build plots.

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -1 +1,5 @@
-benchmarks/**
+benchmark
+.direnv
+*.csv
+*.png
+*.txt

Lab1/.gitignore

@@ -0,0 +1,3 @@
+benchmarks/**
+dist/**
+results.txt

Lab1/benchmark.py

@@ -7,6 +7,8 @@ def run_benchmark(program_name, array):
     start = time()
     process = subprocess.Popen(program_name, stdin=subprocess.PIPE)
     process.communicate((f"{len(array)}\n" + "\n".join(map(str, array))).encode())
+    if process.returncode == 1:
+        raise RuntimeError("Error while benchmarking")
     end = time()
     return end - start
 
@@ -25,23 +27,37 @@ def generate_sequence(sequence_type, array_size):
         raise ValueError("Invalid sequence type")
 
 def plot(program_name, sequences, array_size):
+    sequence_names = {
+        "random": "Losowy",
+        "sorted": "Posortowany",
+        "reversed": "Odwrócony",
+        "constant": "Stały",
+        "v_shaped": "V-kształtny",
+    }
     plt.figure(figsize=(10, 6))
     for sequence_type, timings in sequences.items():
-        plt.plot(array_size, timings, label=sequence_type)
+        plt.plot(array_size, timings, label=sequence_names[sequence_type])
-    plt.xlabel("")
+    plt.xlabel("Rozmiar tablicy")
     plt.ylabel("Czas (ms)")
-    plt.title(f"{program_name}")
+    plt.title(program_name.capitalize())
     plt.legend()
-    plt.savefig(f"benchmarks/{program_name}.png")
+    plt.savefig(f"./benchmarks/{program_name}.png")
-    # plt.show()
 
 if __name__ == "__main__":
-    program_names = ["./insertion", "./selection"]
+    program_names = ["insertion", "selection", "heapsort", "mergesort"]
     sequence_types = ["random", "sorted", "reversed", "constant", "v_shaped"]
     array_sizes = [i for i in range(1000, 15001, 1000)]
+    tests = 10
 
     with open("results.txt", "w") as f:
         for program_name in program_names:
+            if program_name == "heapsort" or program_name == "mergesort":
+                array_sizes = [i for i in range(15000, 40001, 1000)]
+                tests  = 20
+            else:
+                array_sizes = [i for i in range(1000, 15001, 1000)]
+                tests = 10
+
             sequenceTiming = {
                 "random": [],
                 "sorted": [],
@@ -54,16 +70,18 @@ if __name__ == "__main__":
                 print(f" - running {sequence_type}")
                 for array_size in array_sizes:
                     sequence = generate_sequence(sequence_type, array_size)
-                    print(f"   - running {sequence_type} with size {array_size}")
                     durations = []
-                    for i in range(10):
+                    for i in range(tests):
-                        duration = run_benchmark(program_name, sequence)
+                        print(f"     - running {sequence_type} with size {array_size} {i+1}/{tests}", end="\r")
+                        duration = run_benchmark(f"./dist/{program_name}", sequence)
                         duration *= 1000
                         durations.append(duration)
+                        if program_name == "heapsort" or program_name == "mergesort":
                             sleep(0.1)
+                    print()
                     duration = sum(durations) / len(durations)
-                    f.write(f"{program_name} {sequence_type} {array_size} {duration}\n")
                     sequenceTiming[sequence_type].append(duration)
-                    sleep(0.5)
+                    if program_name == "heapsort" or program_name == "mergesort":
+                        sleep(0.1)
             plot(program_name, sequenceTiming, array_sizes)
     print("Benchmark finished")

Lab1/insertion.c

@@ -4,13 +4,23 @@
 // Capture the pipe of array contents, first number is the size
 int main() {
   int s;
-  scanf("%d", &s);
+  int res = scanf("%d", &s);
-  int *array = malloc(sizeof(int) * s);
+  if (res != 1) {
-  for (int i = 0; i < s; i++) {
+    fprintf(stderr, "Error reading size\n");
-    scanf("%d", &array[i]);
+    return 1;
   }
 
-  for (int j = 1; j < s; j++) {
+  int *array = malloc(sizeof(int) * s);
+  for (int i = 0; i < s; i++) {
+    res = scanf("%d", &array[i]);
+    if (res != 1) {
+      fprintf(stderr, "Error reading array element\n");
+      free(array);
+      return 1;
+    }
+  }
+
+  for (int j = 0; j < s; j++) {
     int key = array[j];
     int i = j - 1;
     while (i >= 0 && array[i] > key) {

Lab1/mergesort.c

@@ -0,0 +1,53 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void MergeSort(int A[], int l, int r, int B[]) {
+  int m = (l + r) / 2;
+  if (m - l > 0) {
+    MergeSort(A, l, m, B);
+  }
+
+  if (r - m > 0) {
+    MergeSort(A, m + 1, r, B);
+  }
+
+  int i = l;
+  int j = m + 1;
+  for (int k = l; k <= r; k++) {
+    if ((i <= m && j > r) || ((i <= m && j <= r) && A[i] <= A[j])) {
+      B[k] = A[i];
+      i++;
+    } else {
+      B[k] = A[j];
+      j++;
+    }
+  }
+
+  for (int k = l; k <= r; k++) {
+    A[k] = B[k];
+  }
+}
+
+int main() {
+  int size;
+  int res = scanf("%d", &size);
+  if (res != 1) {
+    fprintf(stderr, "Error reading size\n");
+    return 1;
+  }
+
+  int *arrayA = malloc(sizeof(int) * size);
+  for (int i = 0; i < size; i++) {
+    res = scanf("%d", &arrayA[i]);
+    if (res != 1) {
+      fprintf(stderr, "Error reading array element\n");
+      free(arrayA);
+      return 1;
+    }
+  }
+
+  int *arrayB = malloc(sizeof(int) * size);
+  MergeSort(arrayA, 0, size - 1, arrayB);
+
+  return 0;
+}

Lab1/quicksort.c

@@ -0,0 +1,80 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+enum PivotStrategy { RIGHTMOST = 0, MIDDLE = 1, RANDOM = 2 };
+
+void swap(int *a, int *b) {
+  int temp = *a;
+  *a = *b;
+  *b = temp;
+}
+
+int partition(int A[], int left, int right, int pivot_strategy, int length) {
+  int pivot_index;
+  if (pivot_strategy == RIGHTMOST) {
+    pivot_index = right;
+  } else if (pivot_strategy == MIDDLE) {
+    pivot_index = (left + right) / 2;
+  } else if (pivot_strategy == RANDOM) {
+    pivot_index = (rand() % (length + 1));
+  }
+
+  int pivot = A[pivot_index];
+  swap(&A[pivot_index], &A[right]);
+  int i = left - 1;
+
+  for (int j = left; j < right; j++) {
+    if (A[j] <= pivot) {
+      i++;
+      swap(&A[i], &A[j]);
+    }
+  }
+  swap(&A[i + 1], &A[right]);
+  return i + 1;
+}
+
+void quicksort(int A[], int p, int r, int pivot_strategy, int length) {
+  if (p < r) {
+    int q = partition(A, p, r, pivot_strategy, length);
+    quicksort(A, p, q - 1, pivot_strategy, length);
+    quicksort(A, q + 1, r, pivot_strategy, length);
+  }
+}
+
+int main() {
+  int size, pivot_strategy;
+
+  if (scanf("%d", &size) != 1) {
+    fprintf(stderr, "Error reading size\n");
+    return 1;
+  }
+
+  if (scanf("%d", &pivot_strategy) != 1) {
+    fprintf(stderr, "Error reading pivot strategy\n");
+    return 1;
+  }
+  // Init the random number generator when needed
+  if (pivot_strategy == RANDOM) {
+    srand(size);
+  }
+
+  int *array = malloc(sizeof(int) * size);
+  if (array == NULL) {
+    fprintf(stderr, "Memory allocation failed\n");
+    return 1;
+  }
+
+  for (int i = 0; i < size; i++) {
+    if (scanf("%d", &array[i]) != 1) {
+      fprintf(stderr, "Error reading array element\n");
+      free(array);
+      return 1;
+    }
+  }
+
+  quicksort(array, 0, size - 1, pivot_strategy, size);
+
+  free(array);
+  return 0;
+}

Lab1/quicksort_bench.py

@@ -0,0 +1,66 @@
+import subprocess
+from time import time, sleep
+import matplotlib.pyplot as plt
+
+pivot_strategies = {
+    "rightmost": 0,
+    "middle": 1,
+    "random": 2
+}
+
+def run_benchmark(array, pivot_strategy):
+    input_data = f"{len(array)}\n{pivot_strategies[pivot_strategy]}\n" + "\n".join(map(str, array)) + "\n"
+
+    start = time()
+    process = subprocess.Popen("./dist/quicksort", stdin=subprocess.PIPE)
+    process.communicate(input_data.encode())
+    if process.returncode != 0:
+        raise RuntimeError("Error while benchmarking")
+    end = time()
+
+    return end - start
+
+def generate_v_shaped(array_size):
+    return [i for i in range(array_size // 2, 0, -1)] + [i for i in range(array_size // 2)]
+
+def plot(sequences, array_size):
+    pivot_names = {
+        "rightmost": "Pivot prawy",
+        "middle": "Pivot środkowy",
+        "random": "Pivot losowy"
+    }
+    plt.figure(figsize=(10, 6))
+    for pivot_type, timings in sequences.items():
+        plt.plot(array_size, timings, label=pivot_names[pivot_type])
+    plt.xlabel("Rozmiar tablicy")
+    plt.ylabel("Czas (ms)")
+    plt.title("Quicksort")
+    plt.legend()
+    plt.savefig("./benchmarks/quicksort.png")
+
+if __name__ == "__main__":
+    array_sizes = [i for i in range(1000, 15001, 1000)]
+
+    with open("results.txt", "w") as f:
+        sequenceTiming = {
+                "rightmost": [],
+                "middle": [],
+                "random": [],
+            }
+        for pivot_strategy in pivot_strategies:
+            print(f"Running with pivot strategy {pivot_strategy}")
+            for array_size in array_sizes:
+                sequence = generate_v_shaped(array_size)
+                durations = []
+                for i in range(10):
+                    print(f"     - with size of {array_size} {i+1}/10", end="\r")
+                    duration = run_benchmark(sequence, pivot_strategy)
+                    duration *= 1000
+                    durations.append(duration)
+                    sleep(0.1)
+                print()
+                duration = sum(durations) / len(durations)
+                sequenceTiming[pivot_strategy].append(duration)
+                sleep(0.1)
+        plot(sequenceTiming, array_sizes)
+    print("Benchmark finished")

Lab1/selection.c

@@ -8,6 +8,7 @@ int main() {
     fprintf(stderr, "Error reading size\n");
     return 1;
   }
+
   int *array = malloc(sizeof(int) * s);
   for (int i = 0; i < s; i++) {
     res = scanf("%d", &array[i]);

Lab2/avl/avl.cpp

@@ -0,0 +1,86 @@
+#include "avl.h"
+#include "algorithm"
+
+int getHeight(AVL_tree *root) {
+  if (!root)
+    return 0;
+  return root->height;
+}
+
+AVL_tree *rightRotate(AVL_tree *y) {
+  AVL_tree *x = y->left;
+  AVL_tree *T2 = x->right;
+
+  x->right = y;
+  y->left = T2;
+
+  y->height = 1 + std::max(getHeight(y->left), getHeight(y->right));
+  x->height = 1 + std::max(getHeight(x->left), getHeight(x->right));
+
+  return x;
+}
+
+AVL_tree *leftRotate(AVL_tree *x) {
+  AVL_tree *y = x->right;
+  AVL_tree *T2 = y->left;
+
+  y->left = x;
+  x->right = T2;
+
+  x->height = 1 + std::max(getHeight(x->left), getHeight(x->right));
+  y->height = 1 + std::max(getHeight(y->left), getHeight(y->right));
+
+  return y;
+}
+
+int getBalance(AVL_tree *root) {
+  if (!root)
+    return 0;
+  return getHeight(root->left) - getHeight(root->right);
+}
+
+AVL_tree *insertAVL(AVL_tree *root, int value) {
+  if (root == nullptr) {
+    return new AVL_tree{value, nullptr, nullptr, 1};
+  }
+
+  if (value < root->info) {
+    root->left = insertAVL(root->left, value);
+  } else if (value > root->info) {
+    root->right = insertAVL(root->right, value);
+  } else {
+    return root;
+  }
+
+  root->height = 1 + std::max(getHeight(root->left), getHeight(root->right));
+
+  int balance = getBalance(root);
+
+  if (balance > 1 && value < root->left->info) {
+    return rightRotate(root);
+  }
+
+  if (balance < -1 && value > root->right->info) {
+    return leftRotate(root);
+  }
+
+  if (balance > 1 && value > root->left->info) {
+    root->left = leftRotate(root->left);
+    return rightRotate(root);
+  }
+
+  if (balance < -1 && value < root->right->info) {
+    root->right = rightRotate(root->right);
+    return leftRotate(root);
+  }
+
+  return root;
+}
+
+void deleteAVL(AVL_tree *root){
+    if (root != nullptr) {
+      deleteAVL(root->left);
+      deleteAVL(root->right);
+      delete root;
+    }
+}

Lab2/avl/avl.h

@@ -0,0 +1,13 @@
+struct AVL_tree {
+  int info;
+  AVL_tree *left;
+  AVL_tree *right;
+  int height;
+};
+
+int getHeight(AVL_tree *root);
+AVL_tree *insertAVL(AVL_tree *root, int value);
+AVL_tree *rotateLeft(AVL_tree *root);
+AVL_tree *rotateRight(AVL_tree *root);
+AVL_tree *searchAVL(AVL_tree *root, int value);
+void deleteAVL(AVL_tree *root);

Lab2/benchmark.cpp

@@ -0,0 +1,178 @@
+#include "avl/avl.h"
+#include "bst/bst.h"
+#include "list/list.h"
+
+#include <algorithm>
+#include <chrono>
+#include <cstdio>
+#include <iostream>
+#include <ostream>
+#include <random>
+#include <set>
+
+void measureList(std::vector<int> *sequence, FILE *file) {
+  float buildTime = 0, searchTime = 0, deleteTime = 0;
+
+  for (int i = 0; i < 10; i++) {
+    std::cout << "- Running list " << i + 1 << "/10\r";
+    fflush(stdout);
+
+    // Measure build time
+    auto start = std::chrono::high_resolution_clock::now();
+    List *head = nullptr;
+    for (int value : *sequence) {
+      head = insert(head, value);
+    }
+    auto end = std::chrono::high_resolution_clock::now();
+    std::chrono::duration<double> elapsed_seconds = end - start;
+    buildTime += elapsed_seconds.count() * 1000; // Convert to milliseconds
+
+    // Now we run the search
+    start = std::chrono::high_resolution_clock::now();
+    for (int value : *sequence) {
+      search(head, value);
+    }
+    end = std::chrono::high_resolution_clock::now();
+    elapsed_seconds = end - start;
+    searchTime += elapsed_seconds.count() * 1000; // Convert to milliseconds
+
+    // Measure deletion time for list
+    start = std::chrono::high_resolution_clock::now();
+    while (head != nullptr) {
+      head = remove(head);
+    }
+    end = std::chrono::high_resolution_clock::now();
+    elapsed_seconds = end - start;
+    deleteTime += elapsed_seconds.count() * 1000; // Convert to milliseconds
+  }
+
+  buildTime /= 10;
+  searchTime /= 10;
+  deleteTime /= 10;
+
+  std::cout << "- List built in " << buildTime << "ms | searched in "
+            << searchTime << "ms | deleted in " << deleteTime << "ms"
+            << std::endl;
+  fprintf(file, "List,%f,%f,%f\n", buildTime, searchTime, deleteTime);
+}
+
+void measureBST(std::vector<int> *sequence, FILE *file) {
+  float buildTime = 0, searchTime = 0, deleteTime = 0;
+
+  for (int i = 0; i < 10; i++) {
+    std::cout << "- Running bst " << i + 1 << "/10\r";
+    fflush(stdout);
+
+    // Measure build time
+    auto start = std::chrono::high_resolution_clock::now();
+    Tree *root = nullptr;
+    for (int value : *sequence) {
+      root = insert(root, value);
+    }
+    // root = balance(root);
+    auto end = std::chrono::high_resolution_clock::now();
+    std::chrono::duration<double> elapsed_seconds = end - start;
+    buildTime += elapsed_seconds.count() * 1000; // Convert to milliseconds
+
+    // Now we run the search
+    start = std::chrono::high_resolution_clock::now();
+    for (int value : *sequence) {
+      search(root, value);
+    }
+    end = std::chrono::high_resolution_clock::now();
+    elapsed_seconds = end - start;
+    searchTime += elapsed_seconds.count() * 1000; // Convert to milliseconds
+
+    // Measure deletion time for tree
+    start = std::chrono::high_resolution_clock::now();
+    deleteTree(root);
+    end = std::chrono::high_resolution_clock::now();
+    elapsed_seconds = end - start;
+    deleteTime += elapsed_seconds.count() * 1000; // Convert to milliseconds
+  }
+
+  buildTime /= 10;
+  searchTime /= 10;
+  deleteTime /= 10;
+
+  std::cout << "- Tree built in " << buildTime << "ms | searched in "
+            << searchTime << "ms | deleted in " << deleteTime << "ms"
+            << std::endl;
+  fprintf(file, "BST,%f,%f,%f\n", buildTime, searchTime, deleteTime);
+}
+
+void benchmarkAVL(std::vector<int> *sequence, FILE *file) {
+  Tree *bst = nullptr;
+  for (int value : *sequence) {
+    bst = insert(bst, value);
+  }
+
+  int heightBST = getHeight(bst, 0);
+  deleteTree(bst);
+
+  AVL_tree *avl = nullptr;
+  for (int value : *sequence) {
+    avl = insertAVL(avl, value);
+  }
+
+  int heightAVL = getHeight(avl);
+  deleteAVL(avl);
+
+  fprintf(file, "%d,%d\n", heightBST, heightAVL);
+}
+
+int main() {
+  // Init the random number generator
+  std::random_device rd;
+  std::mt19937 gen(rd());
+  std::uniform_int_distribution<> dis(1, 1000000);
+
+  int mode = 1;
+  std::cout << "Select benchmark to run:\n 1 - Benchmark List vs BST\n 2 - "
+               "Benchmark BST vs AVL"
+            << std::endl;
+  std::cin >> mode;
+
+  if (mode < 1 && mode > 2) {
+    mode = 1;
+  }
+
+  FILE *file;
+  if (mode == 1) {
+    // Open a file for writing results
+    file = fopen("results.csv", "w");
+    fprintf(file, "Structure,BuildTime,SearchTime,DeleteTime\n");
+  } else {
+    file = fopen("avl.csv", "w");
+    std::fprintf(file, "Structure,Height\n");
+  }
+
+  for (int n = 1; n < 26; n++) {
+    // Using a set here ensures that there are no duplicates
+    std::set<int> sequence;
+    while (sequence.size() < n * 1000) {
+      sequence.insert(dis(gen));
+    }
+
+    std::vector<int> random_sequence_vec;
+    for (int val : sequence) {
+        random_sequence_vec.push_back(val);
+    }
+
+    // Then randomize the sequence so the bst isn't a list (Set keeps the elements in order)
+    std::shuffle(random_sequence_vec.begin(), random_sequence_vec.end(), gen);
+
+    // Display the times like a cascade
+    std::cout << "Running tests for " << n * 1000 << " elements..."
+              << std::endl;
+    if (mode == 1) {
+      measureList(&random_sequence_vec, file);
+      measureBST(&random_sequence_vec, file);
+    } else {
+      benchmarkAVL(&random_sequence_vec, file);
+    }
+  }
+
+  fclose(file);
+  return 0;
+}

Lab2/bst/bst.cpp

@@ -0,0 +1,42 @@
+#include "bst.h"
+
+Tree *insert(Tree *root, int value) {
+  if (root == nullptr) {
+    root = new Tree{value, nullptr, nullptr};
+  } else if (value < root->info) {
+    root->left = insert(root->left, value);
+  } else if (value > root->info) {
+    root->right = insert(root->right, value);
+  }
+  return root;
+}
+
+Tree *search(Tree *root, int value) {
+  Tree *ptr = root;
+  while (ptr != nullptr) {
+    if (value > ptr->info)
+      ptr = ptr->right;
+    else if (value < ptr->info)
+      ptr = ptr->left;
+    else
+      return ptr;
+  }
+  return nullptr;
+}
+
+void deleteTree(Tree *root) {
+  if (root != nullptr) {
+    deleteTree(root->left);
+    deleteTree(root->right);
+    delete root;
+  }
+}
+
+int getHeight(Tree *root, int height) {
+  if (root == nullptr)
+    return height;
+  height += 1;
+  int leftHeight = getHeight(root->left, height);
+  int rightHeight = getHeight(root->right, height);
+  return std::max(leftHeight, rightHeight) + 1;
+}

Lab2/bst/bst.h

@@ -0,0 +1,12 @@
+#include <vector>
+
+struct Tree {
+  int info;
+  Tree *left;
+  Tree *right;
+};
+
+Tree *insert(Tree *root, int value);
+Tree *search(Tree *root, int value);
+void deleteTree(Tree *root);
+int getHeight(Tree *root, int height);

Lab2/list/list.cpp

@@ -0,0 +1,51 @@
+#include "list.h"
+#include <sys/types.h>
+
+List *insert(List *head, int value) {
+  if (head == nullptr) {
+    List *node = new List();
+    node->data = value;
+    node->next = nullptr;
+    return node;
+  }
+
+  if (head->data > value) {
+    List *newHead = new List();
+    newHead->data = value;
+    newHead->next = head;
+    head = newHead;
+  } else {
+    List *tmp = head;
+    while (tmp->next != nullptr && tmp->next->data < value) {
+      tmp = tmp->next;
+    }
+
+    List *tail = new List();
+    tail->data = value;
+    // Set the pointer to the next, we don't know if its at the end or not
+    tail->next = tmp->next;
+    tmp->next = tail;
+  }
+
+  return head;
+}
+
+List *search(List *list, int value) {
+  List *ptr = list;
+  while (ptr != nullptr && ptr->data != value) {
+    if (ptr->data > value) return nullptr;
+    ptr = ptr->next;
+  }
+
+  return ptr;
+}
+
+// Remove the first element
+List *remove(List *head) {
+  if (head == nullptr) {
+    return nullptr;
+  }
+  List *newHead = head->next;
+  delete head;
+  return newHead;
+}

Lab2/list/list.h

@@ -0,0 +1,8 @@
+struct List {
+  int data;
+  List *next;
+};
+
+List *insert(List *head, int data);
+List *search(List *list, int value);
+List* remove(List *head);

Lab2/plot.py

@@ -0,0 +1,58 @@
+import matplotlib.pyplot as plt
+
+def plot(header:str, first:list[int], second:list[int], log=False, labels=("Lista", "Drzewo BST"), ylabel= "Czas (ms)"):
+    plt.figure(figsize=(10, 6))
+    plt.plot(range(1000,25001,1000), first, label=labels[0])
+    plt.plot(range(1000,25001,1000), second, label=labels[1])
+    plt.xlabel("Rozmiar tablicy")
+    plt.ylabel(ylabel)
+    if log:
+        plt.yscale('log', base=2)
+    plt.title(header)
+    plt.legend()
+    plt.savefig(f"./charts/{header}.png")
+
+if __name__ == "__main__":
+    with open('results.csv', 'r') as file:
+        data = file.read()
+        lines = data.split('\n')
+        headers = lines[0].split(',')
+        values = [line.split(',') for line in lines[1:]]
+
+        bstTimes = {
+            "build":[],
+            "search":[],
+            "delete":[]
+        }
+
+        listTimes = {
+            "build":[],
+            "search":[],
+            "delete":[]
+        }
+
+        for row in values:
+            if row[0] == 'BST':
+                bstTimes['build'].append(float(row[1]))
+                bstTimes['search'].append(float(row[2]))
+                bstTimes['delete'].append(float(row[3]))
+            elif row[0] == 'List':
+                listTimes['build'].append(float(row[1]))
+                listTimes['search'].append(float(row[2]))
+                listTimes['delete'].append(float(row[3]))
+
+
+        plot("Tworzenie", listTimes['build'], bstTimes['build'], log=True)
+        plot("Wyszukiwanie", listTimes['search'], bstTimes['search'], log=True)
+        plot("Usuwanie", listTimes['delete'], bstTimes['delete'])
+
+    with open("avl.csv", "r") as file:
+        data = file.read()
+        lines = data.split('\n')
+        headers = lines[0].split(',')
+        values = [line.split(',') for line in lines[1:-1]]
+
+        bstHeights = [int(x[0]) for x in values]
+        avlHeights = [int(x[1]) for x in values]
+
+        plot("AVL", bstHeights, avlHeights, log=True, labels=("Drzewo BST", "Drzewo AVL"), ylabel="Wysokość drzewa")

Lab3/graph.py

@@ -0,0 +1,219 @@
+import random
+import time
+import matplotlib.pyplot as plt
+import sys
+from typing import List
+
+def generateGraph(n: int, saturation: int):
+    edges = (n * (n - 1)) // 2
+    maxEdges = edges * saturation // 100
+
+    graph = {i: [] for i in range(n)}
+    edgeCount = 0
+
+    # Generate a Hamiltonian cycle
+    cycle = list(range(n))
+    random.shuffle(cycle)
+    for i in range(n):
+        u = cycle[i]
+        v = cycle[(i + 1) % n]
+        graph[u].append(v)
+        graph[v].append(u)
+        edgeCount += 1
+
+    while edgeCount < maxEdges:
+        # Find all pairs (u, v) where u < v, u != v, v not in graph[u], and deg(u)%2 == deg(v)%2
+        candidates = []
+        for u in range(n):
+            for v in range(u + 1, n):
+                if v not in graph[u] and (len(graph[u]) % 2) == (len(graph[v]) % 2):
+                    candidates.append((u, v))
+        if not candidates:
+            break  # No more valid pairs to add without breaking Eulerian property
+        u, v = random.choice(candidates)
+        graph[u].append(v)
+        graph[v].append(u)
+        edgeCount += 1
+
+    for i in range(n):
+        random.shuffle(graph[i])
+
+    print(f"Generated graph with {n} nodes and {edgeCount} edges (saturation: {saturation}%, max edges: {maxEdges})")
+
+    # # Print the graph as a matrix for debugging
+    # graph_matrix = [[0] * n for _ in range(n)]
+    # for u in range(n):
+    #     for v in graph[u]:
+    #         graph_matrix[u][v] = 1
+    # print("Graph adjacency matrix:")
+    # for row in graph_matrix:
+    #     print(" ".join(map(str, row)))
+
+    return graph
+
+def graphFromMatrix(matrix: List[List[int]]):
+    n = len(matrix)
+    graph = {i: [] for i in range(n)}
+    for i in range(n):
+        for j in range(n):
+            if matrix[i][j] == 1:
+                graph[i].append(j)
+    return graph
+
+def findEulerianCycle(graph_adj_sets) -> List[int] | None:
+    current_graph = {v: set(neighbors) for v, neighbors in graph_adj_sets.items()}
+
+    if not current_graph:
+        return None # No nodes, empty path
+
+    path = []
+    start_vertex = -1
+    for v_check, neigh_check in current_graph.items():
+        if neigh_check:
+            start_vertex = v_check
+            break
+
+    if start_vertex == -1:
+        if len(current_graph) == 1:
+             return [next(iter(current_graph))] # Single node graph
+        return None
+
+    stack = [start_vertex]
+
+    while stack:
+        v = stack[-1]
+        if current_graph.get(v):
+            u = current_graph[v].pop()
+            current_graph[u].remove(v)
+            stack.append(u) # Move to the next vertex
+        else:
+            path.append(stack.pop()) # Backtrack and add to the path
+
+    return path[::-1] # Return the path in reverse order
+
+def findHamiltonianCycle(graph):
+    n = len(graph)
+    path = []
+
+    def backtrack(v, visited):
+        if len(path) == n:
+            return path[0] in graph[v]  # Check if the last node connects to the first
+
+        for neighbor in graph[v]:
+            if neighbor not in visited:
+                visited.add(neighbor)
+                path.append(neighbor)
+
+                if backtrack(neighbor, visited):
+                    return True
+
+                visited.remove(neighbor)
+                path.pop()
+
+        return False
+
+    for start in range(n):
+        path.append(start)
+        visited = {start}
+
+        if backtrack(start, visited):
+            return path
+
+        path.pop()
+
+    return None
+
+if __name__ == "__main__":
+    # Check if there was given a second argument, if yes run a test instead of the benchmark
+    if len(sys.argv) > 1:
+        file = sys.argv[1]
+        """
+        Format we are expecting:
+        0 0 1 1 1 1
+        0 0 1 1 0 0
+        1 1 0 0 1 1
+        1 1 0 0 1 1
+        1 0 1 1 0 1
+        1 0 1 1 1 0
+        """
+        with open(file, 'r') as f:
+            lines = f.readlines()
+            matrix = [list(map(int, line.strip().split())) for line in lines]
+            graph = graphFromMatrix(matrix)
+
+            euler = findEulerianCycle(graph)
+            hamilton = findHamiltonianCycle(graph)
+
+            if euler is None:
+                print("Eulerian cycle not found.")
+                exit(1)
+            if hamilton is None:
+                print("Hamiltonian cycle not found.")
+                exit(1)
+
+            # We were asked to print the cycles starting from 1. Add the first node to the end of the list to make it a cycle
+            # Expected: 1 6 5 4 6 3 5 1 4 2 3 1 | Actual: 1 3 2 4 1 5 3 6 4 5 6 1
+            print("Eulerian Cycle:", [v + 1 for v in euler ])
+            # 1 3 2 4 5 6 1 | Real: 1 3 2 4 5 6 1
+            print("Hamiltonian Cycle", [v + 1 for v in hamilton] + [hamilton[0] + 1])
+
+            exit(0)
+
+    n_values = range(10, 26)  # Number of nodes to test
+    saturations = [30, 70]  # Saturation levels to test
+    results = {}
+
+    for saturation in saturations:
+        hamilton_times = []
+        eulerian_times = []
+
+        for n in n_values:
+            print(f"Running tests for {n} nodes with {saturation}% saturation...")
+            graph = generateGraph(n, saturation)
+
+            eulerian_time = 0
+            hamilton_time = 0
+            for _ in range(10):
+                start_time = time.time()
+                if findHamiltonianCycle(graph) is None:
+                    raise ValueError("Hamiltonian cycle not found, which should not happen with the generated graph.")
+                end_time = time.time()
+                measured_time = (end_time - start_time) * 1000
+                hamilton_time += measured_time
+                eulerian_graph_repr = {v_node: set(v_neighbors) for v_node, v_neighbors in graph.items()}
+                start_time = time.time()
+
+                graph_for_eulerian_run = {node: set(adj_nodes) for node, adj_nodes in graph.items()}
+                start_time = time.time()
+                if findEulerianCycle(graph_for_eulerian_run) is None: # Pass the new set-based representation
+                    raise ValueError("Eulerian cycle not found...")
+                end_time = time.time()
+                eulerian_time += (end_time - start_time) * 1000
+
+
+            # Average the times over 10 runs
+            hamilton_times.append(hamilton_time / 10)
+            eulerian_times.append(eulerian_time / 10)
+            time.sleep(0.1)  # Sleep to avoid overwhelming the system
+
+        results[saturation] = {
+            "hamilton_times": hamilton_times,
+            "eulerian_times": eulerian_times,
+        }
+
+        plt.figure(figsize=(10, 6))
+        plt.plot(n_values, hamilton_times, label="Cykl Hamiltona", marker="o")
+        plt.plot(n_values, eulerian_times, label="Cykl Eulera", marker="s")
+        plt.xlabel("Liczba wierzchołków (n)")
+        plt.ylabel("Czas działania (ms)")
+        plt.title(f"Czas działania algorytmów dla {saturation}% nasycenia")
+        plt.legend()
+        plt.grid(True)
+        if(saturation == 30):
+            plt.yscale('log', base=2)
+
+        filename = f"saturation_{saturation}.png"
+        plt.savefig(filename)
+        print(f"Plot saved as '{filename}'")
+
+    print("All tests completed.")

Lab3/hamilton.py

@@ -0,0 +1,126 @@
+import random
+import time
+import matplotlib.pyplot as plt
+import sys
+from typing import List
+
+def generate_hamiltonian_graph(n, saturation_percent):
+    max_possible_edges = n * (n - 1) // 2
+    target_edges = max_possible_edges * saturation_percent // 100
+
+    # Working on sets, its just easier
+    graph = {i: set() for i in range(n)}
+    edge_count = 0
+
+    cycle = list(range(n))
+    random.shuffle(cycle)
+    for i in range(n):
+        u = cycle[i]
+        v = cycle[(i + 1) % n]
+        if v not in graph[u]:
+            graph[u].add(v)
+            graph[v].add(u)
+            edge_count += 1
+
+    possible_edges = {(i, j) for i in range(n) for j in range(i+1, n)}
+    used_edges = {(min(u, v), max(u, v)) for u in graph for v in graph[u]}
+    available_edges = list(possible_edges - used_edges)
+    random.shuffle(available_edges)
+
+    while edge_count < target_edges and available_edges:
+        u, v = available_edges.pop()
+        if v not in graph[u]:
+            graph[u].add(v)
+            graph[v].add(u)
+            edge_count += 1
+
+    return {k: list(v) for k, v in graph.items()}
+
+def graphFromMatrix(matrix: List[List[int]]):
+    n = len(matrix)
+    graph = {i: [] for i in range(n)}
+    for i in range(n):
+        for j in range(n):
+            if matrix[i][j] == 1:
+                graph[i].append(j)
+    return graph
+
+
+def find_all_hamiltonian_cycles(graph):
+    n = len(graph)
+    cycles = set()
+
+    def backtrack(path, visited):
+        if len(path) == n:
+            if path[0] in graph[path[-1]]:
+                # We have to normalize the cycle to avoid duplicates
+                cycle = tuple(path)
+                rev_cycle = tuple(reversed(path))
+                canonical = min(cycle, rev_cycle)
+
+                min_idx = canonical.index(min(canonical))
+                normalized = canonical[min_idx:] + canonical[:min_idx]
+                cycles.add(normalized)
+            return
+
+        for neighbor in graph[path[-1]]:
+            if neighbor not in visited:
+                visited.add(neighbor)
+                path.append(neighbor)
+                backtrack(path, visited)
+                path.pop()
+                visited.remove(neighbor)
+
+    for start in range(n):
+        backtrack([start], {start})
+
+    return list(cycles)
+
+if __name__ == "__main__":
+    if len(sys.argv) > 1:
+        file = sys.argv[1]
+        """
+        Format we are expecting:
+        0 0 1 1 1 1
+        0 0 1 1 0 0
+        1 1 0 0 1 1
+        1 1 0 0 1 1
+        1 0 1 1 0 1
+        1 0 1 1 1 0
+        """
+        with open(file, 'r') as f:
+            lines = f.readlines()
+            matrix = [list(map(int, line.strip().split())) for line in lines]
+            graph = graphFromMatrix(matrix)
+
+            cycles = find_all_hamiltonian_cycles(graph)
+
+            for cycle in cycles:
+                print(cycle)
+            exit(0)
+
+    n_values = range(5, 15)
+    saturation = 50
+
+    times = []
+    cycle_counts = []
+
+    for n in n_values:
+        graph = generate_hamiltonian_graph(n, saturation)
+        print(f"Running test for n={n}...")
+        start = time.time()
+        cycles = find_all_hamiltonian_cycles(graph)
+        elapsed = (time.time() - start) * 1000
+        times.append(elapsed)
+        cycle_counts.append(len(cycles))
+        print(f"Found {len(cycles)} cycles in {elapsed:.2f} ms")
+
+    plt.figure(figsize=(10, 6))
+    plt.plot(n_values, times, marker="o")
+    plt.xlabel("Liczba wierzchołków (n)")
+    plt.ylabel("Czas działania [ms]")
+    plt.title("Czas znajdowania wszystkich cykli Hamiltona dla nasycenia 50%")
+    plt.grid(True)
+    plt.tight_layout()
+    plt.yscale('log', base=2)
+    plt.savefig("hamilton.png")

Lab4/backpack.py

@@ -0,0 +1,167 @@
+import random
+import time
+import matplotlib.pyplot as plt
+import sys
+
+def greedy(n, weight, value, capacity ):
+    pairs = list(zip(value, weight))
+    pairs.sort(reverse=True, key=lambda x: x[0] / x[1])
+
+    current_value = 0
+    currentCapacity = capacity
+
+    for i in range(n):
+        if pairs[i][1] <= currentCapacity:
+            current_value += pairs[i][0]
+            currentCapacity -= pairs[i][1]
+
+    return current_value
+
+def dynamic(n, weight, value, capacity, print_table=False):
+    table = [[0 for _ in range(capacity + 1)] for _ in range(n + 1)]
+
+    for i in range(1, n + 1):
+        for w in range(capacity + 1):
+            if weight[i - 1] <= w:
+                table[i][w] = max(table[i - 1][w], table[i - 1][w - weight[i - 1]] + value[i - 1])
+            else:
+                table[i][w] = table[i - 1][w]
+
+
+    if print_table:
+        print("\n".join(["\t".join(map(str, row)) for row in table]))
+    return table[n][capacity]
+
+def benchmark_containers(container_list, capacity):
+    greedy_times = []
+    dynamic_times = []
+    greedy_values = []
+    dynamic_values = []
+    rel_errors = []
+
+    # For each container number or capacity
+    for containers in container_list:
+        weights = [random.randint(1, 10) for _ in range(containers)]
+        values = [random.randint(1, 20) for _ in range(containers)]
+
+        # Dynamic
+        start = time.time()
+        dyn = dynamic(containers, weights, values, capacity)
+        dyn_time = (time.time() - start) * 1000
+
+        # Greedy
+        start = time.time()
+        gr = greedy(containers, weights, values, capacity)
+        gr_time = (time.time() - start) * 1000
+
+        greedy_times.append(gr_time)
+        dynamic_times.append(dyn_time)
+        greedy_values.append(gr)
+        dynamic_values.append(dyn)
+
+        print(f"greedy: {gr}, dynamic: {dyn}, rel_error: {(dyn - gr) / dyn * 100 if dyn != 0 else 0:.2f}%")
+        rel_errors.append((dyn - gr) / dyn * 100 if dyn != 0 else 0)
+
+    return greedy_times, dynamic_times, rel_errors
+
+def benchmark_capacity(capacity_list, containers):
+    greedy_times = []
+    dynamic_times = []
+    greedy_values = []
+    dynamic_values = []
+    rel_errors = []
+
+    # For each container number or capacity
+    for capacity in capacity_list:
+        weights = [random.randint(1, 10) for _ in range(containers)]
+        values = [random.randint(2, 20) for _ in range(containers)]
+
+        # Dynamic
+        start = time.time()
+        dyn = dynamic(containers, weights, values, capacity)
+        dyn_time = (time.time() - start) * 1000
+
+        # Greedy
+        start = time.time()
+        gr = greedy(containers, weights, values, capacity)
+        gr_time = (time.time() - start) * 1000
+
+        greedy_times.append(gr_time)
+        dynamic_times.append(dyn_time)
+        greedy_values.append(gr)
+        dynamic_values.append(dyn)
+        print(f"greedy: {gr}, dynamic: {dyn}, rel_error: {(dyn - gr) / dyn * 100 if dyn != 0 else 0:.2f}%")
+
+        rel_errors.append((dyn - gr) / dyn * 100 if dyn != 0 else 0)
+
+    return greedy_times, dynamic_times, rel_errors
+
+if __name__ == "__main__":
+    # Check if there was given a second argument, if yes run a test instead of the benchmark
+    if len(sys.argv) > 1:
+        file = sys.argv[1]
+        """
+        Format we are expecting:
+        5 - liczba elementów
+        3 2 4 3 1 - rozmiary
+        5 3 4 4 2 - wartości
+        8 - rozmiar plecaka
+        """
+        with open(file, 'r') as f:
+            lines = f.readlines()
+            n = int(lines[0].strip())
+            weights = list(map(int, lines[1].strip().split()))
+            values = list(map(int, lines[2].strip().split()))
+            capacity = int(lines[3].strip())
+
+            dynamic(n, weights, values, capacity, print_table=True)
+            print(greedy(n, weights, values, capacity))
+        exit(0)
+
+    # First test case - constant capacity, variable number of containers
+    containers_list = list(range(1, 51, 2))
+
+    # Constant capacity of 20
+    greedy_times, dynamic_times, rel_errors = benchmark_containers(containers_list, 20)
+
+    plt.figure(figsize=(12,5))
+    plt.subplot(1,2,1)
+    plt.plot(containers_list, greedy_times, label='Zachłanny', )
+    plt.plot(containers_list, dynamic_times, label='Dynamiczny', )
+    plt.xlabel('Liczba kontenerów')
+    plt.ylabel('Czas [ms]')
+    # plt.yscale('log', base=2)
+    plt.title('Czas działania dla zmiennej liczby kontenerów (B=20)')
+    plt.legend()
+
+    axis = plt.subplot(1,2,2)
+    plt.bar(containers_list, rel_errors)
+    plt.xlabel('Liczba kontenerów')
+    plt.ylabel('Błąd względny [%]')
+    axis.yaxis.set_major_formatter(lambda x, pos: f'{x}%'.replace('.0', ''))
+    plt.title('Błąd względny')
+    plt.savefig('benchmark_vary_n.png')
+
+
+    # Second test case - variable capacity, constant number of containers
+    capacity_list = list(range(5, 101, 5))
+
+    # Constant number of containers of 50
+    greedy_times, dynamic_times, rel_errors = benchmark_capacity(capacity_list, 50)
+
+    plt.figure(figsize=(12,5))
+    plt.subplot(1,2,1)
+    plt.plot(capacity_list, greedy_times, label='Zachłanny' )
+    plt.plot(capacity_list, dynamic_times, label='Dynamiczny')
+    plt.xlabel('Pojemność')
+    plt.ylabel('Czas [ms]')
+    plt.title('Czas działania dla zmiennej pojemności (n=50)')
+    plt.legend()
+
+    axis =  plt.subplot(1,2,2)
+    plt.bar(capacity_list, rel_errors )
+    plt.xlabel('Pojemność')
+    plt.ylabel('Błąd względny [%]')
+    axis.yaxis.set_major_formatter(lambda x, pos: f'{x}%'.replace('.0', ''))
+    plt.title('Błąd względny')
+    plt.savefig('benchmark_vary_capacity.png')

flake.lock

@@ -0,0 +1,25 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1739736696,
+        "narHash": "sha256-zON2GNBkzsIyALlOCFiEBcIjI4w38GYOb+P+R4S8Jsw=",
+        "rev": "d74a2335ac9c133d6bbec9fc98d91a77f1604c1f",
+        "revCount": 754461,
+        "type": "tarball",
+        "url": "https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.754461%2Brev-d74a2335ac9c133d6bbec9fc98d91a77f1604c1f/01951426-5a87-7b75-8413-1a0d9ec5ff04/source.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://flakehub.com/f/NixOS/nixpkgs/0.1.%2A.tar.gz"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,28 @@
+{
+  description = "A Nix-flake-based C/C++ development environment";
+
+  inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.*.tar.gz";
+
+  outputs = { self, nixpkgs }:
+    let
+      supportedSystems = [ "x86_64-linux" ];
+      forEachSupportedSystem = f:
+        nixpkgs.lib.genAttrs supportedSystems
+        (system: f { pkgs = import nixpkgs { inherit system; }; });
+    in {
+      devShells = forEachSupportedSystem ({ pkgs }: {
+        default = pkgs.mkShell.override {
+          # Override stdenv in order to change compiler:
+          # stdenv = pkgs.clangStdenv;
+        } {
+          packages = with pkgs;
+            [
+              clang-tools
+              cmake
+              libgcc
+              python312Packages.matplotlib
+            ] ++ (if system == "aarch64-darwin" then [ ] else [ gdb ]);
+        };
+      });
+    };
+}

results.txt

@@ -1,150 +0,0 @@
-./insertion random 1000 1.0615110397338867
-./insertion random 2000 1.5358448028564453
-./insertion random 3000 2.274918556213379
-./insertion random 4000 3.3971309661865234
-./insertion random 5000 4.603886604309082
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