#include <bits/stdc++.h>
using namespace std;
int main() {
  int n = 0;
  int answer = 0;
  cin >> n;
  int last = -1;
  int xs = 0, ys = 0, x = 0, y = 0;
  for (int i = 0; i < n; i++) {
    int px = x, py = y;
    char c;
    cin >> c;
    if (c == 'L')
      x--;
    else if (c == 'R')
      x++;
    else if (c == 'U')
      y++;
    else
      y--;
    if (abs(x - xs) + abs(y - ys) != i - last)
      answer++, last = i - 1, xs = px, ys = py;
  }
  answer++;
  cout << answer;
}
