#include <bits/stdc++.h>
using namespace std;
const int MAXN = 10000002;
const int MOD2 = 998244353;
const int MOD = 1000000007;
const int INF = 1e8;
const long double EPS = 1e-7;
int main(int argc, char** argv) {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  ;
  {
    long long int n, cl = 0, cr = 0;
    cin >> n;
    string s;
    cin >> s;
    for (int i = 0; i < (int)n; i++) {
      if (s[i] == 'L')
        cl++;
      else
        cr++;
    }
    cout << cl + cr + 1 << "\n";
  }
  return 0;
}
