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First solution in Clear category for Skew-symmetric Matrix by syssneck
import copy
def checkio(matrix):
matrix_n = copy.deepcopy(matrix)
p = range(len(matrix))
for row in p:
for column in p:
matrix_n[column][row] = -matrix[row][column]
return True if matrix_n == matrix else False
#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
print("Example:")
print(checkio([
[0, 1, 2],
[-1, 0, 1],
[-2, -1, 0]]))
assert checkio([
[0, 1, 2],
[-1, 0, 1],
[-2, -1, 0]]) == True, "1st example"
assert checkio([
[0, 1, 2],
[-1, 1, 1],
[-2, -1, 0]]) == False, "2nd example"
assert checkio([
[0, 1, 2],
[-1, 0, 1],
[-3, -1, 0]]) == False, "3rd example"
print("Coding complete? Click 'Check' to earn cool rewards!");
Dec. 23, 2019