一分钟看懂代码

import java.util.Scanner;

public class Main {

public static void main(String[] args) {

int a=0;

int i=0;

int j=0;

int m=0;

int n=0;

int count=1;

int[][] ary=new int[100][100];

Scanner sc = new Scanner(System.in);

a=sc.nextInt();

for(j=0;j<a;j++) {

m=j;

n=0;

for(i=0;i<=j;i++) {

ary[m][n]=count++;

// System.out.println(ary[m][n]);

m=m-1;

n=j-m;

}

}

for(i=0;i<a;i++) {

for(j=0;j<a-i;j++) {

System.out.print(ary[i][j]+" ");

}

System.out.println();

}

}

}