#include <bits/stdc++.h>
using namespace std;
bool sortbysec(const pair<int, int> a, const pair<int, int> b) {
  return a.second < b.second;
}
bool isPrime(int n) {
  if (n <= 1) return false;
  for (int i = 2; i < n; i++)
    if (n % i == 0) return false;
  return true;
}
int gcd(int a, int b) {
  if (b == 0) return a;
  return gcd(b, a % b);
}
const int day[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int n, l = 0, r = 0, ans;
  cin >> n;
  string s;
  cin >> s;
  for (int i = 0; i < s.length(); i++) {
    if (s[i] == 'L')
      l++;
    else
      r++;
  }
  ans = l + r + 1;
  cout << ans;
  return 0;
}
