using System;
using System.Collections.Generic;
using System.IO;
class Solution {
    static void Main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution */
        int noOfSteps = Int32.Parse(Console.ReadLine());
            string strSteps = Console.ReadLine();

            int counterSteps = noOfSteps;
            int noOfVallies = 0;
            foreach (char s in strSteps)
            {
                int tempSteps = counterSteps;
                if(s == 'U')
                {
                    counterSteps++;
                }
                if(s == 'D')
                {
                    counterSteps--;
                }
                if (counterSteps == noOfSteps && tempSteps < noOfSteps)
                {
                    noOfVallies++;
                        
                }
            }

            Console.WriteLine(noOfVallies);
    }
}