#include <bits/stdc++.h>
using namespace std;
void solve() {
  long long int n;
  cin >> n;
  string k;
  cin >> k;
  long long int l = 0, r = 0;
  for (auto x : k)
    if (x == 'L')
      l++;
    else
      r++;
  cout << r + l + 1;
}
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  ;
  long long int T = 1;
  while (T--) {
    solve();
    cout << endl;
  }
  return 0;
}
