#include<bits/stdc++.h>
using namespace std;
int main(){
	int x[15][15]={0},n,i,j,b;
	cin>>n;
	b=n*n;
	for(i=0;i<n;i++){
		for(j=n-1;j>=0;j--){
			x[i][j]=b;
			b=b-1;
	    }
}
    for(i=0;i<n;i++){
    	for(j=0;j<n;j++){
    		cout<<x[i][j]<<" ";
    	}
    	cout<<endl;
    }
}
/**************************************************************
	Problem: 1186
	User: lvrenxiang
	Language: C++
	Result: Wrong Answer
****************************************************************/