DSA · Theory

Sort the given Matrix

Theory

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Sort the given Matrix is a DSA topic. In plain words you use it for names A→Z in the roll list. Don’t start with a slogan — start with that picture.

Smallest example: n log n vs n². Type it, run it, and say what you see. If you can do that from memory, you know Sort the given Matrix.

From the example next to this theory: Sort the given Matrix — arrays give O(1) index access; matrices are arrays of arrays.

Trap — unstable sort when equal keys matter. Fix that before you talk about advanced DSA.

Viva — what is Sort the given Matrix? Then show n log n vs n². Then name the trap.

Exam tip

What is Sort the given Matrix? Show this: n log n vs n². Trap: unstable sort when equal keys matter.

arr = [10, 20, 30, 40]
print(arr[2], arr[-1])
matrix = [[1, 2], [3, 4]]
print(matrix[1][0])  # 3

Sort the given Matrix — arrays give O(1) index access; matrices are arrays of arrays.