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

vector<int> init (int n) {
    vector<int> r;
    int a = 0;
    int k = 1;
    while (a <= n) {
        a = k * (k + 1) / 2;
        r.emplace_back(a);
        k += 1;
    }
    
    return r;
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    int N;
    int ans = 0;
    cin >> N;
    vector<int> v = init(N);
    int p = v.size() - 1;
    
    while (N > 0) {
        if (N >= v[p]) {
            ans += N / v[p];
            N %= v[p];
        }
        p -= 1;
    }
    
    cout << ans << endl;
    
    return 0;
}