Cody

Problem 1508. Change the sign

Solution 2715834

Submitted on 20 Jul 2020
This solution is locked. To view this solution, you need to provide a solution of the same size or smaller.

Test Suite

Test Status Code Input and Output
1   Fail
x = [-1 2 3;1 -2 -2;3 3 -3]; y_correct = [ 1 -3 -3;-2 2 -2;-3 -3 3]; assert(isequal(SignChange(x),y_correct))

y = 1 -2 -3 -1 2 2 -3 -3 3

Assertion failed.

2   Fail
x = magic(4); y_correct = [16 -13 -13 -13; -10 11 -10 -10;-12 -12 6 -12;-15 -15 -15 1]; assert(isequal(SignChange(x),y_correct))

y = -16 -2 -3 -13 -5 -11 -10 -8 -9 -7 -6 -12 -4 -14 -15 -1

Assertion failed.

3   Pass
x = zeros(4); y_correct = x; assert(isequal(SignChange(x),y_correct))

y = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

4   Fail
x = [-1 1 -1;1 -1 1;-1 -2 -3]; y_correct = [1 -1 -1;-1 1 -1;-2 -2 3]; assert(isequal(SignChange(x),y_correct))

y = 1 -1 1 -1 1 -1 1 2 3

Assertion failed.