#include<bits/stdc++.h> using namespace std; int main(){ int n; int a[100][100]; cin>>n; for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++){ a[i][j]=1; } } for(int i=1;i<=n/2+1;i++){ for(int j=1;j<=n/2+1;j++){ a[i][n/2+2-i]=0; a[i][i+n/2]=0; a[j+n/2][j]=0; a[j+n/2][n+1-j]=0; } } a[n/2+1][n/2+1]=0; for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++){ cout<<setw(3)<<a[i][j]; } cout<<endl; } return 0; } /************************************************************** Problem: 1327 User: wangsenlin Language: C++ Result: Accepted Time:10 ms Memory:2072 kb ****************************************************************/