#include <iostream>
using namespace std;
int main()
{
int n;
scanf("%d",&n);
int k[n][n];
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
if((i+j)%2==0)k[i][j]=1;
else k[i][j]=0;
}
}
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
printf("%d ",k[i][j]);
}
printf("\n");
}
return 0;
}
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