#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
   int i,j,count = 0,l;
    
    cin>>j;
   char str[j];
    int sum =0,flag = 1;
    for(i =0; i < j; i++)
    {
            cin >> str[i];
    }
    
    for(i = 0;i<j;i++)
    {
        flag  =1;
        if(str[i] == 'U')
        {
            sum = sum + 1;    
        }
        
        else if(str[i] == 'D')
        {
            sum --;    
            flag = 0;
        }
        
        if(sum == 0 && flag ==1)
         {
            count++;
        }
    }
    cout <<count;
   
    
    return 0;
}