#include <stdio.h>
#include <stdbool.h>
int main() {
int year;//2020 //2021
scanf("%d\n",&year);
if((year%4==0&&year%100!=0)||(year%400==0)){
    printf("%D\n",year);//2020
}
else{
    year++; //2020 //2023 //2024
    while(true){
        if((year%4==0&&year%100!=0)||(year%400==0)){
            printf("%d\n",year); //2024
            break;
        }
    }
}