Pls help me ! Change Matrix

I don't known how to soloving this arthmetic ! pls give me alrorithm.

title :

For the matrix A size mxn. Allow change the marks in the same row or column of A. Algorithms to set up following a number of changes allowed to be the matrix A satisfying nature: Total number of
rank of each row and each column is greater than 0.

意味不明

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help me this propblem !

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