#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int a[21][21]; int n; cin>>n; for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++){ if(i<j) 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; }