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First solution in Clear category for Can Balance by kodix09
from typing import Iterable
def calculate_balance(fulcrum_index, weights):
return sum(weights[i]*(fulcrum_index-i) for i in range(len(weights)))
def can_balance(weights: Iterable) -> int:
for i in range(len(weights)):
if calculate_balance(i, weights) == 0:
return i
return -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!")
Jan. 11, 2019
