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