#include <stdio.h>

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