1243. Array Transformation
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class Solution:
def transformArray(self, arr: List[int]) -> List[int]:
f = True
while f:
f = False
t = arr[:]
for i in range(1, len(t) - 1):
if t[i] > t[i - 1] and t[i] > t[i + 1]:
arr[i] -= 1
f = True
if t[i] < t[i - 1] and t[i] < t[i + 1]:
arr[i] += 1
f = True
return arr