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Matrix

Count Submatrices With Equal Frequency of X and Y

Count Submatrices with Top-Left Element and Sum Less Than k

Cut Off Trees for Golf Event

Delete Greatest Value in Each Row

Design Excel Sum Formula

Detect Cycles in 2D Grid

Difference Between Ones and Zeros in Row and Column

Disconnect Path in a Binary Matrix by at Most One Flip

Escape the Spreading Fire

Find a Peak Element II

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