#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
#include <cmath>
#include <iomanip>
#include <map>
using namespace std;
typedef long long LL;

int main(){
    LL L, K;
    cin >> L >> K;
    for(int i = 0; i+1 < K; i++){
        LL d = K - i;
        LL dw = L / (d*d);
        L -= dw;
    }
    cout << L << endl;
    return 0;
}