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26Size

Leading solution size is 11.
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Test

Code Input and Output

1

Pass

%% positive integers x = 5; assert(isequal(unique(rand_plusminus1(x)),[-1;1]))

[Warning: This is an obsolete function and may be removed in the future. Please use RANDI instead.] [> In randint at 41 In rand_plusminus1 at 4 In verifyCode>evaluateCode at 227 In verifyCode at 40 In fevalJSON at 14 In workspacefunc at 7]

2

Pass

%% one element x = 1; assert(isequal(abs(rand_plusminus1(x)),1))

[Warning: This is an obsolete function and may be removed in the future. Please use RANDI instead.] [> In randint at 41 In rand_plusminus1 at 4 In verifyCode>evaluateCode at 227 In verifyCode at 40 In fevalJSON at 14 In workspacefunc at 7]

3

Pass

%% zero => empty matrix x = 0; assert(isequal(rand_plusminus1(x),[]))

4

Pass

%% positive integers x = 999; assert(isequal(unique(rand_plusminus1(x)),[-1;1]))

[Warning: This is an obsolete function and may be removed in the future. Please use RANDI instead.] [> In randint at 41 In rand_plusminus1 at 4 In verifyCode>evaluateCode at 227 In verifyCode at 40 In fevalJSON at 14 In workspacefunc at 7]