#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
using namespace std;
using ll = long long ;
using P = pair<int,int> ;
using pll = pair<long long,long long>;
constexpr int INF = 1e9;
constexpr long long LINF = 1e17;
constexpr int MOD = 1000000007;
const int MX = 5010;
vector<int> trinum(MX,0);

void init(){
    rep(i,MX){
        trinum[i] = i*(i+1)/2;
    }
}

int main(){
    init();
    int n;
    cin >> n;
    int ans = 3;
    rep(i,MX){
        if(trinum[i]==n){
            ans = 1;
            break;
        }

        rep(j,MX){
            if(trinum[i] + trinum[j] == n){
                ans = 2;
            }
        }
    }
    cout << ans << endl;
    return 0;
}