create table by G.w.

main(a,i,j){scanf("%d",&a);for(i=1;i<=a;putchar(10),i++)for(j=1;j<=a;j++)putchar(i==1?49:i==a?49:j==1?49:j==a?49:48);}

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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