Not sure what;s going wrong

#1

So my approach is to find clusters and mark them with a code, and against each particular cluster code, I store its size. The i check each and every dry cell to see where can I find such a cell which will join ponds of maximum size (clusters of max size). Here is my code : https://ide.codingblocks.com/s/96440
I tried downloading test cases and the small ones are giving expected output, still it says wrong-answers. Not sure whats wrong, please help

#2

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