#include<iostream>
#include<vector>
#include<bitset>
#include<algorithm>
#include<cmath>
using namespace std;
int main(){ 
    long long W,D,yaruki;
    cin >> W >> D;
    for(long long i=D;i>=1;i--){
        yaruki = W/(i*i);
        W-=yaruki;
    }
   cout << yaruki;
    return 0;
}