diff --git a/a1/program.c b/a1/program.c
index 409f91d..82bc5c1 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -17,6 +17,7 @@ int main() {
     int cislo = 0;
     int counter = 0;
     int che = 0;
+    int count = 0;
     while ((r = fgets(znaky, LINE_SIZE, stdin)) != NULL) {
         if (feof(stdin)) {
             break;
@@ -49,11 +50,21 @@ int main() {
 			if(yyyy < 1900 || yyyy > 2100){
 			che = 1;
 			}
+			if(yyyy % 100 != 0 && yyyy % 4 == 0){
+				count++;
+			}
+			if(yyyy % 400 == 0){
+				count++;
+			}
                 }
                 counter++;
                 zaciatok_cisla = koniec_cisla + 1;
             }
         }
+	if(count != 1 && mm == 2 && dd == 29){
+	che = 1;
+	//printf("Neplatny datum.\n");
+	}
 	if(counter != 3 || che == 1){
 	printf("Neplatny datum.\n");
 	che = 1;