#include <bits/stdc++.h>
using namespace std;
string s;
int main(void) {
  int n;
  cin >> n >> s;
  int l = 0, r = 0;
  for (auto &c : s)
    if (c == 'L')
      ++l;
    else
      ++r;
  cout << r + l + 1 << endl;
  return 0;
}
