打印三角矩阵

package Array;

import java.util.Scanner;

/**
 * Created by zdmein on 2018/3/6.
 */
public class Bianli45 {
    public static void main(String [] args){
        //输入数据，转变矩阵
        Scanner in =new Scanner(System.in);
        int N=in.nextInt();

        for(int i=0;i<N;i++){
            for(int j=0;j<i;j++){
                System.out.print(N-i+N*j+j+" ");
            }
            System.out.print(N*(i+1)+" ");
            System.out.println();
        }

        //后半段
        int k=1;
        for(int i=N;i<N*2-1;i++){
            for(int j=0;j<N-k;j++){
                System.out.print(N*(i-N)+(j+1)*(N+1)+" ");
            }
            k++;
           // System.out.print(N*(i+1)+" ");
            System.out.println();
        }
        }
}