C++ Solution to Coding Challenge 59. Spiral Matrix II
Problem statement
Given a positive integer n, generate an n x n matrix filled with elements from 1 to n^2 in spiral order.
Example 1
Input: n = 3
Output: [[1,2,3],[8,9,4],[7,6,5]]
Example 2
Input: n = 1
Output: [[1]]
Constraints
1 <= n <= 20.
So...
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