#include <bits/stdc++.h>
using namespace std;
using ll=long long;

ll downfloor(ll x,ll m) {
  ll r=(x%m+m)%m;
  return (x-r)/m;
}

int main() {
  ll w,d;cin>>w>>d;
  for(ll i=1;i<d;i++)
    w-=floor(w/((d-i+1)*(d-i+1)));
  cout<<w<<endl;
}