#include<bits/stdc++.h>
using namespace std;
int main() {
	int n;
	cin >> n;
	int a[n][n], x = 1;
	for (int i = 0; i < n; i++) {
		if (i % 2 == 0) {
			for (int j = 0; j < n; j++) {
				a[i][j] = x;
				x++;
			}
		} else {
			for (int j = n; j >= 0; j--) {
				a[i][j] = x;
				x++;
			}
		}

	}
	for(int i=0;i<n;i++){
		for(int j=n;j>=0;j--){
			if(a[i][j]<10){
				cout<<0;
			}
			cout<<a[i][j];
		}
		cout<<endl;
	}
	return 0;
}