From 9489bbdb43c59033b9f2aad16a07c529cdc1e748 Mon Sep 17 00:00:00 2001
From: Max Ipatov <st142148@student.spbu.ru>
Date: Thu, 11 Dec 2025 16:54:27 +0300
Subject: [PATCH 1/3] Solve task to print oreted and unique numbers

---
 src/rewrite/task1/main.c | 98 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 src/rewrite/task1/main.c

diff --git a/src/rewrite/task1/main.c b/src/rewrite/task1/main.c
new file mode 100644
index 0000000..26d5573
--- /dev/null
+++ b/src/rewrite/task1/main.c
@@ -0,0 +1,98 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void merge(int* arr, int left, int middle, int right)
+{
+    int i, j, k;
+    int n = middle - left + 1;
+    int m = right - middle;
+    int* leftArr = malloc(n * sizeof(int));
+    int* rightArr = malloc(m * sizeof(int));
+
+    for (i = 0; i < n; i++)
+        leftArr[i] = arr[left + i];
+
+    for (j = 0; j < m; j++)
+        rightArr[j] = arr[middle + 1 + j];
+
+    i = 0;
+    j = 0;
+    k = left;
+
+    while (i < n && j < m) {
+        if (leftArr[i] <= rightArr[j]) {
+            arr[k] = leftArr[i];
+            i++;
+        }
+        else {
+            arr[k] = rightArr[j];
+            j++;
+        }
+        k++;
+    }
+
+    while (i < n) {
+        arr[k] = leftArr[i];
+        i++;
+        k++;
+    }
+
+    while (j < m) {
+        arr[k] = rightArr[j];
+        j++;
+        k++;
+    }
+
+    free(leftArr);
+    free(rightArr);
+}
+
+void mergeSort(int* arr, int left, int right)
+{
+    if (left < right) {
+        int middle = left + (right - left) / 2;
+        mergeSort(arr, left, middle);
+        mergeSort(arr, middle + 1, right);
+        merge(arr, left, middle, right);
+    }
+}
+
+
+int* removeDuplicates(int* arr, int* arraySize)
+{
+    if (*arraySize <= 0)
+        return arr;
+
+    int j = 0;
+    for (int i = 0; i < *arraySize - 1; i++) {
+        if (arr[i] != arr[i + 1])
+            arr[j++] = arr[i];
+    }
+    arr[j++] = arr[*arraySize - 1];
+
+    *arraySize = j;
+    return realloc(arr, *arraySize * sizeof(int));
+}
+
+int main(void)
+{
+    int* array = malloc(1 * sizeof(int));   
+    int number = 999;
+    int count = 0;
+
+    while (number != 0) {
+        scanf("%d", &number);
+        count++;
+        array = realloc(array, count * sizeof(int));
+        array[count - 1] = number;
+    }
+
+    mergeSort(array, 0, count - 1);
+    array = removeDuplicates(array, &count);
+
+    for (int i = 1; i < count; i++)
+        printf("%d ", array[i]);
+
+    printf("\n");
+    return 0;
+}
\ No newline at end of file

From cc174122715229f8ace91081bc7aebc1e2795565 Mon Sep 17 00:00:00 2001
From: Max Ipatov <st142148@student.spbu.ru>
Date: Thu, 11 Dec 2025 16:56:29 +0300
Subject: [PATCH 2/3] Solve task about minimize integer

---
 src/rewrite/task2/main.c | 58 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 src/rewrite/task2/main.c

diff --git a/src/rewrite/task2/main.c b/src/rewrite/task2/main.c
new file mode 100644
index 0000000..6e44e3f
--- /dev/null
+++ b/src/rewrite/task2/main.c
@@ -0,0 +1,58 @@
+#include <stdio.h>
+#include <stdbool.h>
+
+long int minimizeNumber(long int n) 
+{
+    if (n <= 0) {
+        return 0;
+    }
+
+    int cnt[10] = {0};
+
+    while (n > 0) {
+        int d = n % 10;
+        cnt[d]++;
+        n /= 10;
+    }
+
+    long int result = 0;
+
+    for (int d = 1; d <= 9; d++) {
+        if (cnt[d] > 0) {
+            result = d;
+            cnt[d]--;
+            break;
+        }
+    }
+
+    for (int d = 0; d <= 9; d++) {
+        while (cnt[d] > 0) {
+            result = result * 10 + d;
+            cnt[d]--;
+        }
+    }
+
+    return result;
+}
+
+bool testZero()
+{
+    return minimizeNumber(0) == 0;
+}
+
+bool testWithZero()
+{
+    return minimizeNumber(1001) == 1001;
+}
+
+bool testAllDigits()
+{
+    return minimizeNumber(8967450123L) == 1023456789L;
+}
+
+int main(void)
+{
+    if (!testZero() || !testWithZero() || !testAllDigits())
+        return 1;
+    return 0;
+}

From b13ed3a2dc408c659265e75bc82b51d0de7bd29a Mon Sep 17 00:00:00 2001
From: Max Ipatov <st142148@student.spbu.ru>
Date: Thu, 11 Dec 2025 18:01:15 +0300
Subject: [PATCH 3/3] Create list

---
 src/rewrite/task3/list.c | 49 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 src/rewrite/task3/list.c

diff --git a/src/rewrite/task3/list.c b/src/rewrite/task3/list.c
new file mode 100644
index 0000000..533a3b1
--- /dev/null
+++ b/src/rewrite/task3/list.c
@@ -0,0 +1,49 @@
+#include <stdlib.h>
+
+typedef struct listItem {
+    struct listItem* before;
+    int value;
+    int index;
+}
+
+listItem create()
+{
+    listItem* item = (*listItem)malloc(1 * sizeif(listItem));
+    item->value = 0;
+    item->before = NULL;
+    item->index = 0;
+    return item;
+}
+
+
+listItem* insert(listItem* list, newValue* list, int where)
+{
+    if where > list->index {
+        listItem* correctItem;
+        correctItem->index = list->index + 1
+        correctItem->before = list
+    } else {
+        listItem cursor = *list;
+        while (cursor->index != where)
+            cursor = cursor->before;
+        listItem* correctItem = *cursor;
+
+    correctItem->value = *newValue;
+    }
+}
+
+listItem* revert(listItem* list)
+{
+    int lenght = list->index + 1;
+    listItem after = NULL;
+
+    while (list->index != 0) {
+        list->after = before;
+        list->index = lenght - list->index;
+        after = list;
+        list = list->before;
+    }
+
+    return list;
+}
+