# Enter your code here. Read input from STDIN. Print output to STDOUT
nu = input()
s = raw_input()
n = 0
ind = 0
i = 0
d = {'U':1,'D':-1}
while n>= 0:
    n = n + d[s[ind]]
    ind += 1
    if ind == nu:
        break
t = - 1
while ind < nu :
    while t == -1:
        n += d[s[ind]]
        ind += 1
        if ind == nu:
            
            break
        if n >= 0:
            t = 1
    i += 1
    while t == 1:
        n += d[s[ind]]
        ind += 1
        if ind == nu:
            break 
        if n < 0:
            t = -1
print i