Enable Javascript in your browser and then refresh this page, for a much enhanced experience.
Can Balance solution in Uncategorized category for Can Balance by Elena_Korljukova
from typing import Iterable
def can_balance(weights: Iterable) -> int:
if len(weights) == 1:
return 0
for i in range(1, len(weights) - 1):
sum1 = sum([j1 * (weights[:i][::-1].index(j1) + 1) for j1 in weights[:i][::-1]])
sum2 = sum([j2 * (weights[i+1:].index(j2) + 1) for j2 in weights[i+1:]])
if sum1 == sum2:
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!")
June 28, 2020
