#include<iostream>

using namespace std;

int main(){
	int sigoto,sime,sagyo;
	unsigned long long int kazu;
	int i;

	cin >> sigoto >> sime;

	kazu = sime;
	for(i = 1;i < sime; i++){
		//cout <<kazu <<endl;
		sagyo = sigoto / (kazu*kazu);
		kazu--;
		sigoto -= sagyo;

		//cout << sagyo <<" "<< sigoto<<endl;
	}

	cout << sigoto << endl;

	return 0;
}