#include <bits/stdc++.h>
#include "bits/stdc++.h"
#include <iostream>
#include <iomanip>
#include <vector>
#include <algorithm>
#include <string>
#include <sstream>
#include <cmath>
#include <stack>
#include <queue>
#include <cctype>
#include <stdio.h>
#include <map>
#include <unordered_map>
#include <string.h>
#include <utility>

typedef long long ll;

#define rep(i,n) for(ll i=0;i<(ll)(n);i++)
using namespace std;

typedef pair<int, int> P;

vector<ll> coins;

int main() {

	int n = 0;
	cin >> n;

	int k = 1;

	int goukei = 1;

	while (goukei <= n) {

		coins.push_back(goukei);
		k++;
		goukei = k * (k + 1) / 2;

	}
	/*
	 for(int i=0; i<coins.size(); i++){
	 cout<<coins[i]<<endl;
	 }
	 cout<<endl;*/

	int a = 100000000;
	for (int i = coins.size() - 1; i >= 0; i--) {
		int sum = n;

		int ans = 0;

		/*		cout<<sum-coins[i]<<endl;*/
		/*	return 0;*/
		ans = sum / coins[i];

		sum = sum % coins[i];

/*		int ss = lower_bound(coins.begin(),coins.end(),sum)-coins.begin();*/
		for (int j = upper_bound(coins.begin(),coins.end(),sum)-coins.begin(); j >= 0; j--) {

			/*	cout<<coins[j]<<endl;*/

			if (sum / coins[j] != 0) {
				ans = ans + (sum / coins[j]);

				sum = sum % coins[j];

				/*			cout<<coins[j]<<endl;
				 */
				/*cout<<ans<<" "<<sum<<endl;*/
			}
			for (int k = upper_bound(coins.begin(),coins.end(),sum)-coins.begin(); k >= 0; k--) {
				if (sum / coins[k] != 0) {
					ans = ans + (sum / coins[k]);

					sum = sum % coins[k];

				}
			}

		}
		/*
		 cout<<endl;*/

		a = min(a, ans);

	}

	cout << a << endl;
}