Counting Valleys
# HackerRank.com "Counting Valleys" problem
def countingValleys(n, s):
total_valley = 0
location = 0
for i in range(n):
if s[i] == 'D':
if location == 0:
total_valley = total_valley + 1
location = location - 1
continue
elif s[i] == 'U':
location = location + 1
return total_valley