#include<bits/stdc++.h> using namespace std; int main(){ int N; cin>>N; int a[101][101]; int top=0,bottom=N-1,left=0,right=N-1; int num=1; while(num<=N*N){ for(int i=top;i<=bottom && num<=N*N;i++){ a[i][right]=num; num++; }right--; for(int i=right;i>=left && num<=N*N;i--){ a[bottom][i]=num; num++; }bottom--; for(int i=bottom;i>=top && num<=N*N;i--){ a[i][left]=num; num++; }left++; for(int i=left;i<=right && num<=N*N;i++){ a[top][i]=num; num++; }top++; }for(int i=0;i<N;i++){ for(int i=0;i<N;i++){ cout<<a[i][j]<<" " }cout<<endl; }return 0; }