#include <bits/stdc++.h>
using namespace std;
const long long inf = 2000000000000000000LL;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  long long t, n, m, i, j, k, temp, flag, ans;
  cin >> n;
  cout << n + 1;
  return 0;
}
