A binary matrix of nxm is given, you have to toggle any column k number of times so that you can get the maximum number of rows having all 1’s.

for eg, n=3, m=3,

        1 0 0

        1 0 1

        1 0 0

if k=2, then we will toggle column 2 and 3 once and we will get rows 1 and 3 with 1 1 1 and 1 1 1 i.e. all 1’s so answer is 2 as there are 2 rows with all 1’s.

if k=3, then we will toggle column 2 thrice and we will get row 2 with 1 1 1 i.e. all 1’s so answer is 1 as there is 1 row with all 1’s.

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