#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using ul = unsigned long;
using ull = unsigned long long;

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

	int n;
	cin >> n;

	set<ll> s;

	ll val{ 0 }, i{ 1 };
	while (val < n)
	{
		val = i * (i + 1) / 2;
		s.insert(val);
		++i;
	}

	int res = 3;
	if (s.count(n))
		res = 1;
	else
	{
		for (auto it = s.crbegin(); it != s.crend(); ++it)
		{
			if (s.count(n - *it))
			{
				res = 2;
				break;
			}
		}
	}
	cout << res << "\n";

	return 0;
}