import java.io.*;
import java.util.*;

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 sc = new Scanner(System.in);
        int size  =  sc.nextInt();
        
        char[] steps = new char[size];
        for (int i=0;i<size;i++) {
            steps[i] = sc.nextInt();
        }
        currLevel=0;
        for (int j=0;j<steps.size();j++) {
            if ((currLevel == 0) &&(steps[j] == 'U')) {
                valleys++;
                currLevel++;
            }
            else if ((currLevel == 0) && (steps[j] == 'D')) {
                mountain++;
                currLevel--;
                
            }
            
        }
    }
}