#include <iostream>
#include <algorithm>
#include <string>
using namespace std;
 
int main(void){
    unsigned long long int n,m;
    cin >> n >> m;
    
    unsigned long long int a = 0,b = 1;
    
    
    for(unsigned long long int i = 0; i < n-1; i++){
        
        //cout << a << " "  << b << endl;
        a = a+b;
        
        
        a%=m; 
        
        swap(a,b);
        
    }
    
    cout << a << endl;
    
}