#include<bits/stdc++.h> using namespace std; int main(){ int i,j,n,m; int a[100][100]; cin>>n; for(i=0;i<n;i++) for(j=0;j<n;j++) a[i][j]=1; for(i=0;i<=n/2;i++){ a[i][n/2-i]=0; a[n-i-1][n/2-i]=0; a[i][n/2+i]=0; a[n-i-1][n/2-i]=0; } for(i=0;i<n;i++){ for(j=0;j<n;j++) cout<<a[i][j]<<" "; cout<<endl; } return 0; } /************************************************************** Problem: 1327 User: wtq001 Language: C++ Result: Wrong Answer ****************************************************************/