#include <stdio.h>

int main(){
    long long int N, M, tmp, i;
    long long int num[3];

    scanf("%lld %lld", &N, &M);
    num[0] = 0;
    num[1] = 1;
    for(i = 2; i < N; i++){
        num[2] = (num[1] + num[0])%M;
        //printf("%lld\n", num[2]);
        if(i != N - 1){
            tmp = num[1];
            num[1] = num[2];
            num[0] = tmp;
        }
    }

    printf("%lld\n", num[2]);

    return 0;
}