#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{
    year++;
    while(true){
        if((year%4==0&&year%100!=0)||(year%400==0)){
            printf("%d\n",year);
            break;
        }
    }
}
}