从下标变化的规律角度去解决二维数组的对角线打印问题。

import java.util.*; public class Main { public static void main(String[] args) { int[][] arr = {{1,2,3,4,5},{6,7,8,9,10},{11,12,13,14,15},{16,17,18,19,20},{21,22,23,24,25}}; Syste

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