Question is to find \'before\' matrix from a given \'after\' matrix (Check <a href="https://stackoverflow.com/questions/65510354/matrix-summation-challenge\n">this </a> for further details).\n\nAlso, I did find a very similar problem here at leetcode after that. <a href="https://leetcode.com/problems/maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold">#1292</a>\n\n\nGood Luck!

Question is to find \'before\' matrix from a given \'after\' matrix (Check this  for further details).\n\nAlso, I did find a very similar problem here at leetco