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This problem can be solve using divide and conquer.
There are two cases in this problem:
1:(20,20),(20,20)......... there could be many rows like this
2:(22,23),(23,22)....... there could be many rows like this
if you solve both cases and 'merge' them.
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This problem can be solve using divide and conquer. There are two cases in this problem: 1:(20,20),(20,20)......... there could be many rows like this 2:(22,23),(23,22)....... there could be many rows like this
if you solve both cases and 'merge' them.