#include<bits/stdc++.h>
using namespace std;
int n,i,j,a[20][20],s=1;
int main(){
	cin>>n;
	for(j=n;j>=1;j--){
		for(i=1;i<=n;i++){
			a[i][j]=s++;
		}
	}
	for(i=1;i<=n;i++){
		for(j=1;j<=n;j++){
			cout<<a[i][j]<<" ";
		}
		cout<<endl;
	}
	return 0;
}

/**************************************************************
	Problem: 1187
	User: zengyixuan
	Language: C++
	Result: Presentation Error
****************************************************************/