muhamad-ammar / counting-valleys_hackerrank

Counting-Valleys_Hackerrank

An avid hiker keeps meticulous records of their hikes. During the last hike that took exactly steps, for every step it was noted if it was an uphill, , or a downhill, step. Hikes always start and end at sea level, and each step up or down represents a unit change in altitude. We define the following terms:

A mountain is a sequence of consecutive steps above sea level, starting with a step up from sea level and ending with a step down to sea level. A valley is a sequence of consecutive steps below sea level, starting with a step down from sea level and ending with a step up to sea level. Given the sequence of up and down steps during a hike, find and print the number of valleys walked through.

Example

The hiker first enters a valley units deep. Then they climb out and up onto a mountain units high. Finally, the hiker returns to sea level and ends the hike.

Function Description

countingValleys has the following parameter(s):

int steps: the number of steps on the hike

string path: a string describing the path

The first line contains an integer , the number of steps in the hike.

The second line contains a single string , of characters that describe the path.

Constraints

Sample Input

8 UDDDUDUU

Sample Output

1