diff --git a/a1/program.c b/a1/program.c
index 6b652c7..a24d37e 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -41,6 +41,10 @@ int main() {
                 zaciatok_cisla = koniec_cisla + 1;
             }
         }
+	if(counter != 3){
+	printf("Neplatny datum.\n");
+	break;
+	}
         //printf("%d %d %d\n", dd, mm, yyyy);
         time_t t = time(NULL);
         struct tm *tm_date = localtime(&t);