#include <cmath>
#include <string>
#include <vector>
#include <iomanip>
#include <iostream>
#include <algorithm>
#include <functional>
using namespace std;
int n;
int main() {
	cin >> n;
	int ret = 3;
	for (int i = 1; i * (i + 1) / 2 <= n; i++) {
		if (i * (i + 1) / 2 == n) ret = 1;
		for (int j = 1; j * (j + 1) / 2 <= n; j++) {
			if (i * (i + 1) / 2 + j * (j + 1) / 2 == n) ret = min(ret, 2);
		}
	}
	cout << ret << endl;
	return 0;
}