diff --git a/du3/program.c b/du3/program.c
index 5600614..45705f1 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -56,13 +56,19 @@ int main()
 
     while (fgets(line, SIZE, stdin) != NULL)
     {
+        if (line[0] == '\n' || line[0] == '\0')
+        {
+            break;
+        }
         strBuffer[0] = '\0';
         sscanf(line, "%127[^\n]", strBuffer);
+
         if (strBuffer[0] == '\0')
         {
             printf("CHYBA\n");
             continue;
         }
+        
         bool isLineInvalid = false;
         //docasne 'char' premeny
         char num1Temp[TEMPBUFFERSIZE], num2Temp[TEMPBUFFERSIZE], resultTemp[TEMPBUFFERSIZE];