#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;

		 int summ=0;


		 return 0;
		 ans = sum / coins[i];

		 sum = sum % coins[i];

		 summ= sum;

		 */

		if (sum == coins[i]) {
			cout<<1<<endl;
			return 0;
		}

		for (int j = i ; j >= 0; j--) {

			if (coins[j] == sum - coins[j]) {

				cout<<2<<endl;

				return 0;

			}
		}
	}

	cout << 3<< endl;
}