diff --git a/a1/program.exe b/a1/program.exe
index 332f2cf..df14866 100644
Binary files a/a1/program.exe and b/a1/program.exe differ
diff --git a/du1/program.c b/du1/program.c
index 7966dc8..5661b32 100644
--- a/du1/program.c
+++ b/du1/program.c
@@ -14,10 +14,10 @@ int main() {
             count++; //нумерация чисел 
     }
 
-            if (count == 0) { //если не было введено никакое число
-                printf("Chyba: Malo platnych hodnot.\n");
-                return 0;
-            }
+        if (count == 0) { //если не было введено никакое число
+            printf("Chyba: Malo platnych hodnot.\n");
+            return 0;
+    }
 
             for (int i = 0; i < count; i++) { //выписывание всех чисел 
                 printf("Sutaziaci c. %d vypil %d poharov.\n",i+1,results[i]);
diff --git a/du1/program.exe b/du1/program.exe
index 0005b45..c60d3c0 100644
Binary files a/du1/program.exe and b/du1/program.exe differ
diff --git a/du2/program.exe b/du2/program.exe
index bf1103b..64bf57d 100644
Binary files a/du2/program.exe and b/du2/program.exe differ
diff --git a/du4/program.c b/du4/program.c
index f982179..a20528d 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -1,36 +1,69 @@
 #include <stdio.h>
-#include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
 
+#define MAX_NAME_LENGTH 100
+
 typedef struct {
-    char name[100];
-    int golosa;
-} nameandgolosa;
+    char name[MAX_NAME_LENGTH];
+    int votes;
+} Student;
 
-#define MAX_STUDENTS 1000;
+int compare_students(const void *a, const void *b) {
+    const Student *studentA = (const Student *)a;
+    const Student *studentB = (const Student *)b;
 
-int najtistudenta (nameandgolosa students[], int count, const char* name) {
-    for (int i = 0; i < count; i++) {
-        if (strcmp(students[i].name, name) == 0) {
-            return i;
-        }
+    if (studentA->votes != studentB->votes) {
+        return studentB->votes - studentA->votes; // Сортировка по убыванию голосов
+    } else {
+        return strcmp(studentA->name, studentB->name); // Лексикографическая сортировка по имени
     }
-    return -1;
 }
 
-int compare (const void* a, const void* b) {
-    nameandgolosa* studentA = (nameandgolosa*)a;
-    nameandgolosa* studentB = (nameandgolosa*)b;
-
-    if (studentA->golosa != studentB->golosa) {
-        return studentB->golosa - studentA->golosa;
-    }
-    return strcmp(studentA->name, studentB->name);
-}
-
-
 int main() {
+    Student students[100];
+    int student_count = 0;
+    char line[256];
+
+    while (fgets(line, sizeof(line), stdin)) {
+        int votes;
+        char name[MAX_NAME_LENGTH];
+
+        if (sscanf(line, "%d %[^\n]", &votes, name) != 2) {
+            break; // Прерываем чтение при неверном формате
+        }
+
+        // Поиск студента в массиве
+        int found = 0;
+        for (int i = 0; i < student_count; i++) {
+            if (strcmp(students[i].name, name) == 0) {
+                students[i].votes += votes;
+                found = 1;
+                break;
+            }
+        }
+
+        // Если студент не найден, добавляем нового
+        if (!found) {
+            strcpy(students[student_count].name, name);
+            students[student_count].votes = votes;
+            student_count++;
+        }
+    }
+
+    if (student_count == 0) {
+        printf("Chyba: nepodarilo sa nacitat ziadny zaznam.\n");
+        return 1;
+    }
+
+    // Сортировка студентов
+    qsort(students, student_count, sizeof(Student), compare_students);
+
+    // Вывод результатов
+    printf("Vysledky:\n");
+    for (int i = 0; i < student_count; i++) {
+        printf("%d %s\n", students[i].votes, students[i].name);
+    }
+
     return 0;
 }
-
diff --git a/du4/program.exe b/du4/program.exe
index 868e0a8..6ac905f 100644
Binary files a/du4/program.exe and b/du4/program.exe differ