Web Reference: Jul 31, 2024 · HackerRank Counting Valleys problem solution – In this HackerRank Counting Valleys problem in the Interview preparation kit, you are given the sequence of up and down steps during a hike, and you are to find and print the number of valleys walked through. An avid hiker keeps meticulous records of their hikes. During the last hike that took exactly steps steps, for every step it was noted if it was an uphill, U, or a downhill, D step. Hikes always start and end at sea level, and each step up or down represents a 1unit change in altitude. We define the following terms: 1. A mountain is a sequence of c... Oct 18, 2025 · Learn how to solve HackerRank's Counting Valleys problem with clear explanations, Python & Java code, examples, and step-by-step reasoning.
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