def countingValleys(n, s): valleys = 0 hikes = 0 for i in s: if i==’D’: if hikes==0: valleys += 1 hikes -= 1 else: hikes += 1 return valleys Gary is an avid hiker. He tracks his hikes meticulously, paying close attention to small details like topography. During his last hike, he took exactly  steps. For […]