#include <algorithm>
#include <array>
#include <cstdio>
#include <iostream>
#include <numeric>
#include <optional>
#include <vector>

using namespace std;

int main() {
    int64_t w, d;
    cin >> w >> d;
    int64_t ans = 0;
    for (; d > 0; --d) {
        ans = w / (d * d);
        w -= ans;
    }
    cout << ans << endl;
    return 0;
}