Problem 658. Find the biggest empty box

Solution 1186488

Submitted on 11 May 2017 by arvid Martens

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Test	Status	Code Input and Output
1	Pass	a = [1 0; 0 0]; [r1,r2,c1,c2] = biggest_box(a); sub = a(r1:r2,c1:c2); [m,n] = size(sub); len = 1; assert(isequal(sum(sub(:)),0)) assert(isequal(m,len)); assert(isequal(n,len)); r1 = [] c1 = [] r1 = 2 c1 = 1 r2 = 2 c2 = 1
2	Pass	a = [1 0 0; 0 0 0; 0 0 0]; [r1,r2,c1,c2] = biggest_box(a); sub = a(r1:r2,c1:c2); [m,n] = size(sub); len = 2; assert(isequal(sum(sub(:)),0)) assert(isequal(m,len)); assert(isequal(n,len)); r1 = [] c1 = [] r1 = 2 c1 = 1 r2 = 3 c2 = 2
3	Pass	a = eye(9); [r1,r2,c1,c2] = biggest_box(a); sub = a(r1:r2,c1:c2); [m,n] = size(sub); len = 4; assert(isequal(sum(sub(:)),0)) assert(isequal(m,len)); assert(isequal(n,len)); r1 = [] c1 = [] r1 = 0×1 empty double column vector c1 = 0×1 empty double column vector r1 = 0×1 empty double column vector c1 = 0×1 empty double column vector r1 = 0×1 empty double column vector c1 = 0×1 empty double column vector r1 = 0×1 empty double column vector c1 = 0×1 empty double column vector r1 = 5 c1 = 1 r2 = 8 c2 = 4
4	Pass	a = double(magic(7)<6); [r1,r2,c1,c2] = biggest_box(a); sub = a(r1:r2,c1:c2); [m,n] = size(sub); len = 4; assert(isequal(sum(sub(:)),0)) assert(isequal(m,len)); assert(isequal(n,len)); r1 = [] c1 = [] r1 = 0×1 empty double column vector c1 = 0×1 empty double column vector r1 = 0×1 empty double column vector c1 = 0×1 empty double column vector r1 = 2 c1 = 2 r2 = 5 c2 = 5