#59
Spiral Matrix II
medium · verified · 74.7% accepted · 6,893 likes · top 85%
array · matrix · simulation
Description
Given a positive integer n, generate an n x n matrix filled with elements from 1 to n2 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]]
Solution