diff --git a/du4/program.c b/du4/program.c
new file mode 100644
index 0000000..30a0d48
--- /dev/null
+++ b/du4/program.c
@@ -0,0 +1,82 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MAX_MENO 100
+#define MAX_STUDENTI 100
+
+
+typedef struct {
+    char meno[MAX_MENO];
+    int hlasy;
+} Student;
+
+
+int najdi_studenta(Student studenti[], int pocet, char *meno) {
+    for (int i = 0; i < pocet; i++) {
+        if (strcmp(studenti[i].meno, meno) == 0) {
+            return i;
+        }
+    }
+    return -1;
+}
+
+
+int porovnaj(const void *a, const void *b) {
+    Student *s1 = (Student *)a;
+    Student *s2 = (Student *)b;
+
+    
+    if (s2->hlasy != s1->hlasy) {
+        return s2->hlasy - s1->hlasy;
+    }
+    return strcmp(s1->meno, s2->meno);
+}
+
+int main() {
+    Student studenti[MAX_STUDENTI];
+    int pocet_studentov = 0;
+    char meno[MAX_MENO];
+    int hlasy;
+
+    
+    while (scanf("%d ", &hlasy) == 1) {
+        if (fgets(meno, MAX_MENO, stdin) == NULL) {
+            printf("CHYBA\n");
+            return 1;
+        }
+        
+  
+        meno[strcspn(meno, "\n")] = 0;
+
+        if (hlasy <= 0 || strlen(meno) == 0) {
+            printf("CHYBA\n");
+            return 1;
+        }
+
+        int index = najdi_studenta(studenti, pocet_studentov, meno);
+        if (index != -1) {
+            studenti[index].hlasy += hlasy;
+        } else {
+            if (pocet_studentov >= MAX_STUDENTI) {
+                printf("CHYBA\n");
+                return 1;
+            }
+            strcpy(studenti[pocet_studentov].meno, meno);
+            studenti[pocet_studentov].hlasy = hlasy;
+            pocet_studentov++;
+        }
+    }
+
+ 
+    qsort(studenti, pocet_studentov, sizeof(Student), porovnaj);
+
+   
+    printf("Vysledky:\n");
+    for (int i = 0; i < pocet_studentov; i++) {
+        printf("%d %s\n", studenti[i].hlasy, studenti[i].meno);
+    }
+
+    return 0;
+}
+