#include <stdio.h>

int main(void) {
    int n, m, i;
    long long f1 = 0LL, f2 = 1LL, fb;
    
    scanf("%d %d", &n, &m);
    
    for (i = 3; i <= n; i++) {
        fb = (f1 + f2) % m;
        f1 = f2;
        f2 = fb;
    }
    
    printf("%lld\n", fb);
    
    return 0;
}