diff --git a/du3/program.c b/du3/program.c
index 485cb66..086cd13 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -58,6 +58,11 @@ int main()
 
     while (fgets(line, SIZE, stdin) != NULL)
     {
+        //ak nacitany input JE nespravny...
+        if (line[0] != '\0' || line[0] != '\n')
+        {
+            break;
+        }
         if (sscanf(line, "%127[^\n]", strBuffer) == 1)
         {
             bool isLineInvalid = false;
@@ -74,7 +79,6 @@ int main()
             for (int i = 0; strBuffer[i] != '\0'; i++)
             {
                 bool isNegativeSign = false;
-                
                 if (isspace(strBuffer[i]) != 0)
                 {
                     continue;