#3446

Sort Matrix by Diagonals

pupil · 415 · lc medium +25 · 84.7% accepted · 510 likes · top 96%

Description

Given an n x n integer matrix grid, reorganize its values so that:

- Each diagonal in the bottom-left half (including the main diagonal) is arranged in non-increasing order.

- Each diagonal in the top-right half is arranged in non-decreasing order.

Return the modified matrix.

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