import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) throws IOException
    {
        InputStreamReader ir = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(ir);
        int n = Integer.parseInt(br.readLine());
        char steps[] = new char[n];
        for(int i=0; i < n; i++){
            steps[i] = (char)br.read();
        }   
        int sealevel=0;
        int valleys =0;
        for(int i=0; i < n; i++){
            if (steps[i]=='U')
              sealevel++;
            if  (steps[i]=='D')
              sealevel--;
            if  (steps[i]=='U'&&sealevel==0)
              valleys++;
            }
            System.out.println(valleys);     
        }   
               
    }