diff --git a/cv5/program.c b/cv5/program.c
index dd82770..b1bad8f 100644
--- a/cv5/program.c
+++ b/cv5/program.c
@@ -1,7 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <stdbool.h>
 
 #define SIZE 100
 
@@ -35,7 +34,7 @@ int main() {
         memset(line, 0, SIZE);
         char *r = fgets(line, SIZE, stdin);
 
-        // check if the line is empty or just contains newline character
+        // check if the line is empty
         if (r == NULL || (r[0] == '\n' && strlen(r) == 1)) {
             // end of input
             break;
@@ -44,22 +43,20 @@ int main() {
         // parse the string and extract number of votes and student name
         int votes;
         char name[SIZE];
-
-        // check if sscanf successfully parsed the input
-        if (sscanf(line, "%d %[^\n]", &votes, name) != 2 || votes < 0) {
-            // error, input was not in expected format or votes are negative
-            // print error message and continue to next line
-            fprintf(stderr, "Nepodarilo nacitat nic\n");
-            continue;
+        if (sscanf(line, "%d %[^\n]", &votes, name) != 2) {
+            // error, input was not in expected format
+            // print error message and exit
+            fprintf(stderr, "Nepodarilo␣nacitat␣nic\n");
+            return 1;
         }
 
         // check if this student already exists
-        bool found = false;
+        int found = 0;
         for (int i = 0; i < size; i++) {
             if (strcmp(students[i].name, name) == 0) {
                 // add votes to existing student
                 students[i].votes += votes;
-                found = true;
+                found = 1;
                 break;
             }
         }