#include <iostream>
#include <sstream>
#include <vector>
#include <cmath>
using namespace std;
# define M_PI 3.14159265358979323846

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);
    
    long long w, d;
    cin >> w >> d;
    
    while(d > 1){
    	w -= (long long)(w / (d * d));
    	--d;
    }
    
    cout << w << endl;
    return 0;
}