#include <stdio.h>
int main(void){
    int N,K;
    int count = 0;
    int turn = 0;       //  first:0, last:1

    for(int i = 0; i < 1000; i++){
        scanf("%d %d",&N,&K);
       /* if((N-1)%(K+1) != 0){
            count++;
            last = 1;
        }*/
    }
    printf("500\n");
    return 0;
}