#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, i, L = 0, R = 0;
  string key;
  cin >> n;
  cin >> key;
  for (i = 0; i < n; i++) {
    if (key[i] == 'L')
      L++;
    else
      R++;
  }
  cout << abs(R + L) + 1 << endl;
}
