#include <iostream>
using namespace std;

signed main(){
    long long int w , d; cin >> w >> d;
    long long int rest = w;
    for( long long int i = d ; i >= 2 ; --i){
        if( (i * i) > rest ) continue;
        else {
            rest -= static_cast<int>(rest / ( i * i ));
        }
    }
    cout << rest << endl;
}