#include<bits/stdc++.h> using namespace std; int main(){ int j,i,n,a[100][100]={0}; cin>>n; for(i=1;i<=n;i++){ for(j=1;j<=n;j++){ a[i][j]=1; } } for(i=0;i<=n/2;i++){ a[i+1][n/2+1-i]=0; a[i+1][n/2+1+i]=0; a[n-i][n/2+1-i]=0; a[n-i][n/2+1+i]=0; } a[n/2+1][n/2+1]=0; for(i=1;i<=n;i++){ for(j=1;j<=n;j++){ cout<<setw(3)<<a[i][j]; } cout<<endl; } } /************************************************************** Problem: 1327 User: panyuchen Language: C++ Result: Accepted Time:11 ms Memory:2072 kb ****************************************************************/