//prewritten code: https://github.com/antma/algo
import std.algorithm;
import std.array;
import std.conv;
import std.math;
import std.range;
import std.stdio;
import std.string;
import std.traits;

void main() {
  uint n = readln.strip.to!int;
  auto s = readln[0 .. n];
  auto l = s.count ('L');
  auto r = s.count ('R');
  writeln (l + r + 1);
}

