C :

#include "stdio.h"
 
int main() {
    int year1, year2, count = 0;
    int i ;
    scanf("%d", &year1);
    scanf("%d", &year2);
    for( i = year1; i <= year2; ++i){
        if ((i % 4 == 0 && i % 100 != 0) || i % 400 == 0) {
            printf("%d\n", i);
            count++;
        }
    }
    printf("count=%d\n", count);
}