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