#include <bits/stdc++.h>
using namespace std;
int main() {
  int LCount = 0;
  int RCount = 0;
  int total = 1;
  int commandAmt;
  string commands;
  cin >> commandAmt;
  cin >> commands;
  for (int i = 0; i < commandAmt; i++) {
    if (commands[i] == 'L') {
      LCount += 1;
    } else if (commands[i] == 'R') {
      RCount += 1;
    }
  }
  total += LCount;
  total += RCount;
  cout << total;
}
