//by 72
#include<bits/stdc++.h>
#define F(i, a, b) for(int i = a; i <= b; i ++)
#define Fd(i, a, b) for(int i = a; i >= b; i --)
#define pb push_back
#define pii pair<int, int>
#define fi first
#define se second
#define int long long
using namespace std;

const int mod = 998244353;
const int N = 2e5 + 10;
const int inf = 1e18;
typedef array<int, 3> a3; 
typedef long long ll;

int n, m;

void sol() {
    cin >> n;
    if(n < 10) cout << n + 1 << "\n";
    else cout << 10 << "\n";
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int t = 1;
    F(i, 1, t) sol();
    return 0;
}
//sldl