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) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int step = 0;
        int count = 0;
        scan.nextLine();
        String steps = scan.nextLine();
        StringBuilder rep = new StringBuilder();
        
        for(int i = 0; i < steps.length(); i++){
            if(steps.charAt(i) == 'U') 
            {
            step++;
                if(step == 0){
                    count++;
                }
            rep.append(step);
            }
            if(steps.charAt(i) == 'D') 
            {
                step--;
                rep.append(step);
            }
        }
      /*
        String [] split = rep.toString().split("0");
        for(int i = 0; i < split.length; i++){
       // System.out.println(split[i]);
            if(split[i].startsWith("-1") && split[i].length() > 1) count++;
        } 
        if(!rep.toString().endsWith("0")) count --;
        */
        System.out.println(count);
    }
}