#include <bits/stdc++.h>
#define rep(i, a, n) for(int i = a; i < n; i++)
#define REP(i, n) rep(i, 0, n)
#define repb(i, a, b) for(int i = a; i >= b; i--)
#define all(a) a.begin(), a.end()
#define int long long
#define chmax(x, y) x = max(x, y)
#define chmin(x, y) x = min(x, y)
using namespace std;
typedef pair<int, int> P;
const int mod = 1000000007;
const int INF = 1e12;

 
signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n, ans = 3;
    cin >> n;
    for(int i = 1; i * (i + 1) / 2 <= n; i++){
        int a = i * (i + 1) / 2;
        if(a == n){
            ans = 1; break;
        }
        for(int j = 1; j * (j + 1) / 2 <= n; j++){
            int b = j * (j + 1) / 2;
            if(a + b == n){
                chmin(ans, 2LL);
            }
        }
    }
    cout << ans << endl;
}