#include <stdio.h>
#include<stdbool.h>
int main() {
    int year;
    scanf("%d\n",&year);
    if ((year%4==0 && year%100!=0)||(year%400==0))
    {
        printf("%d\n",year);
    }
    else
    {
        
        while(true)
        { 
         year++;
         if ((year%4==0 && year%100!=0)||(year%400==0))
            {
                printf("%d\n",year);
            }   
        }
    }
    return 0;
}