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