LeetCode 1424 | Diagonal Traverse II [medium]

LeetCode 1424 | Diagonal Traverse II is about reading the elements of a 2D grid in a specific bottom-left to top-right diagonal order. The primary challenge stems from the input being a jagged array—where each row can have a different length—which complicates simple grid traversal logic. You must devise a strategy to group all numbers that lie on the same diagonal path and then assemble these groups in the correct sequence, ensuring that within each diagonal, the elements are ordered from the lowest row to the highest.