#include #include #include<math.h> #include #include<string.h> #include #include using namespace std; int main() { int n,q,num=1,i=1,j=1; cin>>n; int a[105][105]={}; q=ceil(n/2.0); for(int k=1;k<=q;k++) { i=k; for(j=k;j<=n-k+1;j++) { a[i][j]=num; num++; } j=n-k+1; for(i=k+1;i<=n-k+1;i++) { a[i][j]=num; num++; } i=n-k+1; for(j=n-k;j>=k;j--) { a[i][j]=num; num++; } j=k; for(i=n-k;i>=k+1;i--) { a[i][j]=num; num++; } } for(int i=1;i<=n;i++) { for(int j=1;j<=n;j++) { cout<<a[i][j]<<" "; } cout<<endl; } return 0; }