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