https://www.acwing.com/problem/content/description/756/

#include<bits/stdc++.h>
using namespace std;
const int N=200;
int n;
int ans[N][N];
int main(){
     for(int i=1;i<=100;i++)
    {
       int h=1;
        for(int j=i;j>=1;j--)
            ans[i][j]=ans[j][i]=h++;
    }
    while(1){
    cin>>n;
    if(!n)break;
   for(int i=1;i<=n;i++){
    for(int j=1;j<=n;j++)
    cout<<ans[i][j]<<' ';
    puts("");
    }
    puts("");
    }
    return 0;
}