#include<bits/stdc++.h>
using namespace std;
int n;
int a[25][25];
int main(){
    cin>>n;
    for(int i=1;i<=n;i++){
        //for(int j=1;j=i;j++){
            a[i][i]=1;
       // }
    } 
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            cout<<setw(3)<<a[i][j];
        }
        cout<<endl;
    }
    return 0;
}
/**************************************************************
	Problem: 1190
	User: wangyousi
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2076 kb
****************************************************************/