#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>

int main() {

    /* Enter your code here. Read input from STDIN. Print output to STDOUT */    
    
    int n;
    int count1=0,count2=0,count3=0;
    scanf("%d",&n);
    char steps[n];
    for(int i=0;i<n;i++){
        scanf("%s",&steps[i]);
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<i;i++){
            if(steps[j]=='U')
                {
                count1++;
            }
            else if(steps[j]=='D'){
                count2++;
            }
            else{}
            if(count1==count2 && steps[j]=='U'){
                count3++;
            }
        }
    }
    printf("%d",count3);
    return 0;
}