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Counting Valleys
Counting Valleys
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Python Solution: def countingValleys(steps, path): sea_level = 0 return sum(1 for i in range(steps) if (sea_level := sea_level + 1 if path[i] == 'U' else sea_level - 1) == 0 and path[i] == 'U')
Go Golang Solution O(n)
Iterate through the path, adjust your altitude according to the current step(+1 for U and -1 for D)
Anytime you come out of a valley and return to sea level (altitude 0) you can count a valley.
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my java solution