#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,countBelow = 0, countAbove = 0,countV = 0,sea = 0,sea1 = 0;
    scanf("%i\n",&n);
    char* hike = malloc(sizeof(char) * n);
    scanf("%s\n",hike);
    for (int i = 0; i < n;i++) {
        //printf("s%i\n",sea);
        if (hike[i] == 'D') {
            if (sea == 0) {
                sea -= 1;
                 //printf("s%i\n",sea);
                countBelow += 1;  
            for (int j = 1; j < (n - i);j++) {
                if (hike[j + i] == 'U') {
                countAbove += 1;
                sea += 1;
                }
                else if (hike[j + i] == 'D') {
                countBelow += 1;  
                
                sea -= 1;
          
                }
                //printf("r%i  rr%i   ss%i    r%i\n",countBelow,j+i,sea,countAbove);
                
                if (countAbove == countBelow ) {
                countV += 1;
                countAbove = 0;
                countBelow = 0; 
                    i = j+i;
                    
                    break;
                }
                
               
            }
           countAbove = 0;
            countBelow = 0; 
        }
            else {
                sea -= 1;
            }
        }
        else {
            sea += 1;
        }
        
    }
    printf("%i",countV);
    
    return 0;
}