#include<iostream> using namespace std; int a[101][101]; int main(){ int n; cin>>n; int h=0; int l=n-1; int k=1; a[h][l]=k; while(k<n*n){ while((h+1<n)&&!a[h+1][l]){ k++; h++; a[h][l]=k; } while((l-1>=0)&&!a[h][l-1]){ k++; l--; a[h][l]=k; } while((h-1>=0)&&!a[h-1][l]){ k++; h--; a[h][l]=k; } while((l+1<n)&&!a[h][l+1]){ k++; l++; a[h][l]=k; } } for(int i=0;i<n;i++){ for(int j=0;j<n;j++){ cout<<a[h][l]<<' '; } cout<<endl; } return 0; }