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First solution in Clear category for Skew-symmetric Matrix by bocian.michal
def checkio(matrix):
ln = len(matrix)
ret = True
for i in range(0,ln):
for j in range(0,ln):
if matrix[i][j]!=-matrix[j][i]:
ret = False
break
if ret == False:
break
return ret
#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
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"
Nov. 25, 2016
