#include <stdio.h>

int main(void)
{
    long n,m,a[3]={0,1},i,j;
    scanf("%ld%ld",&n,&m);
    if(2>n)printf("%ld",a[0]);
    else if(3>n)printf("%ld",a[1]);
    else{
        for(i=2;i<n;i++){
            a[2]=(a[0]+a[1])%m;
            for(j=0;j<2;j++)a[j]=a[j+1];
        }
        printf("%ld",a[2]);
    }
    return 0;
}