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Update and rename array-check_mountain.py to check_mountain.py

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marina 2023-08-07 17:24:20 -07:00 committed by GitHub
parent 37a25d4423
commit 5c0e0228e6
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1 changed files with 2 additions and 9 deletions
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arrays_and_strings/array-check_mountain.py → arrays_and_strings/check_mountain.py
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@ -4,8 +4,7 @@
''' '''
Given an array of integers arr, return true if and only if it is a valid mountain array. Given an array of integers arr, return true if and only if it is a valid mountain array.
An array is a moutain array if and only if:
Recall that arr is a mountain array if and only if:
arr.length >= 3 arr.length >= 3
There exists some i with 0 < i < arr.length - 1 such that: There exists some i with 0 < i < arr.length - 1 such that:
@ -20,12 +19,10 @@ def valid_mountain_array(arr: list[int]) -> bool:
for i, n in enumerate(arr[1:]): for i, n in enumerate(arr[1:]):
if n > last_number: if n > last_number:
if mountain_up == False: if mountain_up == False:
return False return False
elif n < last_number: elif n < last_number:
if i == 0: if i == 0:
return False return False
mountain_up = False mountain_up = False
@ -37,7 +34,3 @@ def valid_mountain_array(arr: list[int]) -> bool:
return not mountain_up return not mountain_up
if __name__ == "__main__":
arr = [0,3,2,1]
print(valid_mountain_array(arr))