#include <bits/stdc++.h>
using namespace std;
int solve() {
  int n, l = 0, r = 0;
  cin >> n;
  string s1;
  cin >> s1;
  for (int i = 0; i < s1.length(); i++) {
    if (s1[i] == 'L')
      l++;
    else
      r++;
  }
  cout << l + r + 1 << "\n";
  return 0;
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  srand(chrono::high_resolution_clock::now().time_since_epoch().count());
  int t = 1;
  while (t--) {
    solve();
  }
}
