#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  if (fopen("input.txt", "r")) {
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
  }
  long long n;
  cin >> n;
  string s;
  cin >> s;
  long long l = 0, r = 0, i;
  for (i = 0; i < n; i++) {
    if (s[i] == 'L') {
      l++;
    } else {
      r++;
    }
  }
  cout << l + r + 1 << endl;
  return 0;
}
