题解 | #蛇形矩阵#

//简洁明了，
import java.util.*;
import java.io.*;
public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        String s=null;
        while((s=br.readLine())!=null){
            int n=Integer.valueOf(s);
            int sum=0;
            int ss=0;
            int first=1;
            for(int i=1;i<n+1;i++){
                for(int j=0;j<=n-i;j++){
                    if(j==0)
                        sum=first;
                    else
                        sum=sum+i+j;
                    System.out.print(sum+" ");
                }
                    System.out.println();
                first=first+i;
            }
        }
    }
}