#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
int s=0,hill=0,vall=0;
void func(char b[],int m,int j)
    {
    int i;
    i=j;
    for( i=j;i<m;i++)
        {
        if(b[i]=='U')
            {
            s++;
}
        else
            {
            s--;
        }
        if(s==0)
            {
            if(b[i]=='D')
                {
                hill++;
            }
            else
                {
                vall++;
            }
            break;
        }
}
    if(i<m)
        {
        func(b,m,(i+1));
    }
}
int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int n;
    cin >> n;
    char c[n];
    for(int i=0;i<n;i++)
        {
        cin >> c[i];
    }
    func(c,n,0);
    cout<<vall<<endl;
    return 0;
}