#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;
                    
                }
                
            }
        }
        return 0;
}