# include<iostream> using namespace std; int n,a[21][21]; int main(){ cin>>n; for(int i=1;i<=n;i++) for(int j=1;j<=n;j++){ if(j>i) a[i][j]=i; else a[i][j]=j; } for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++) cout<<a[i][j]<<" "; cout<<endl; } return 0; }