#include <bits/stdc++.h>
using namespace std;
int main() {
  int k;
  cin >> k;
  string s;
  int x = 0, mn = 0, mx = 0;
  cin >> s;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] == 'L')
      mx++;
    else
      mn++;
  }
  cout << mx + mn + 1 << endl;
  return 0;
}
