leap year or not

#include<stdio.h>
int main()
{
    int a;
    printf("Enter the year:");
    scanf("%d", &a);

    if(a%4 == 0 && a%400 == 0 || a%100 != 0){
        printf("Leap year");
    }
    else{
        printf("Not Leap year");
    }

    return 0;
}