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One liner (long line) solution in Creative category for Can Balance by CDG.Axel
from typing import Iterable
def can_balance(weights: Iterable) -> int:
return 0 if len(weights) == 1 else next(iter(
i for i in range(1, len(weights) - 1)
if sum(weights[j] * (i - j) for j in range(0, i)) ==
sum(weights[j] * (j - i) for j in range(i + 1, len(weights)))), -1)
if __name__ == '__main__':
print("Example:")
print(can_balance([6, 1, 10, 5, 4]))
# These "asserts" are used for self-checking and not for an auto-testing
assert can_balance([6, 1, 10, 5, 4]) == 2
assert can_balance([10, 3, 3, 2, 1]) == 1
assert can_balance([7, 3, 4, 2, 9, 7, 4]) == -1
assert can_balance([42]) == 0
print("Coding complete? Click 'Check' to earn cool rewards!")
Oct. 9, 2021
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