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