Four Corners

10 pts · 10 coins

Python for AIEasy

A grid of numbers is stored as a list of rows, and each row is a list.

Write corner_sum(grid) that returns the sum of the four corner numbers: top-left, top-right, bottom-left and bottom-right.

grid = [[1, 2], [3, 4]]

returns 10

grid = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

returns 20

grid = [[5, 0, 0, 5], [1, 1, 1, 1]]

returns 12

solution.py

1def corner_sum(grid):
2    # your code here
3    pass
4