The given code reads two integers: n, m, then reads nxm integers into 2-D integer array: table. Find and print the size of the longest vertical line of zeros.

Examples:
INPUT OUTPUT
3 3
0 0 0
0 2 0
0 0 3
3
4 5
0 1 0 3 0
1 0 2 0 5
0 1 0 3 0
1 0 2 0 5
1
6 5
8 1 8 3 8
8 1 8 3 8
8 1 8 3 8
8 1 8 3 8
8 1 8 3 8
8 1 8 3 8
0
2 2
0 0
0 0
2
6 5
8 1 8 3 8
8 0 0 0 8
8 1 0 0 8
8 1 0 0 8
8 1 8 0 8
8 1 8 0 8
5


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