8542

Question: Given a matrix and display its elements in spiral order Solution: every time loop a circle. First we need to make sure the vertex position of circle corner. Then start looping. class Solution { public List spiralOrder(int[][] matrix) { List res = new ArrayList<>(); if(matrix == null || matrix.length==0) return res; int r1 = 0, r2 = matrix.length - 1; int c1 = 0, c2 = matrix[0].length - 1; while(r1<=r2 && c1<=c2){ ...