#include <iostream>

using namespace std;

int main()
{
    int n,A[101][101];
    cin>>n;
    for(int c=1;c<=(n+1)/2;c++)
        for(int i=c;i<=n+1-c;i++)
            for(int j=c;j<=n+1-c;j++)
                A[i][j]=c%2;
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n;j++)
            cout<<A[i][j]<<" ";
        cout<<endl;
    }
    return 0;
}

sau

#include <iostream>

using namespace std;

int main()
{
    int n,A[101][101];
    cin>>n;
    for(int i=1;i<=n;i++)
        for(int j=1;j<=n;j++)
            if(i+j<=n+1)
                if(i<j) A[i][j]=i%2;
                else A[i][j]=j%2;
            else A[i][j]=A[n+1-j][n+1-i];
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n;j++)
            cout<<A[i][j]<<" ";
        cout<<endl;
    }
    return 0;
}