#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,i,j,a[99][99];
	cin>>n;
	for(i=0;i<n;i++){
		for(j=n-1;j>=0;j--) a[i][j]=i*n+n-j;
	}
	for(i=0;i<n;i++){
		for(j=0;j<n;j++) cout<<setw(3)<<a[i][j];
		cout<<endl;
	}
return 0;}

/**************************************************************
	Problem: 1189
	User: fzy001
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/