diff --git a/du4/program.c b/du4/program.c
index 30a0d48..fe07f7c 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -1,13 +1,15 @@
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <ctype.h>
 
-#define MAX_MENO 100
-#define MAX_STUDENTI 100
+#define MAX_M 100
+#define MAX_S 100
 
 
 typedef struct {
-    char meno[MAX_MENO];
+    char meno[MAX_M];
     int hlasy;
 } Student;
 
@@ -26,40 +28,56 @@ 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 je_cislo(const char *retazec) {
+    while (*retazec) {
+        if (!isdigit(*retazec)) {
+            return 0;
+        }
+        retazec++;
+    }
+    return 1;
+}
+
 int main() {
-    Student studenti[MAX_STUDENTI];
+    Student studenti[MAX_S];
     int pocet_studentov = 0;
-    char meno[MAX_MENO];
+    char meno[MAX_M];
+    char vstup[MAX_M + 10]; 
     int hlasy;
+    int nacitane = 0; 
 
     
-    while (scanf("%d ", &hlasy) == 1) {
-        if (fgets(meno, MAX_MENO, stdin) == NULL) {
-            printf("CHYBA\n");
-            return 1;
-        }
-        
-  
-        meno[strcspn(meno, "\n")] = 0;
+    while (fgets(vstup, sizeof(vstup), stdin) != NULL) 
+        vstup[strcspn(vstup, "\n")] = 0;
 
-        if (hlasy <= 0 || strlen(meno) == 0) {
-            printf("CHYBA\n");
+    
+        if (strlen(vstup) == 0) {
+            break;
+        }
+
+       
+        if (sscanf(vstup, "%d %[^\n]", &hlasy, meno) != 2 || hlasy <= 0) {
+            printf("Nepodarilo nacitat nic\n");
             return 1;
         }
 
+        nacitane = 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");
+            if (pocet_studentov >= MAX_S) {
+                printf("Nepodarilo nacitat nic\n");
                 return 1;
             }
             strcpy(studenti[pocet_studentov].meno, meno);
@@ -68,10 +86,16 @@ int main() {
         }
     }
 
- 
+    
+    if (!nacitane) {
+        printf("Nepodarilo nacitat nic\n");
+        return 1;
+    }
+
+    
     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);