#include <stdio.h>

int main(int argc, char **argv){
    int i, j, n=5;

    for(i=1;i<=n;i++)         /* n is no of rows which has to be printed*/
    {
        for(j=1;j<=i;j++)
            printf("%d ",(j+i)&1);

        printf("\n");
    }
    return 0;
}