# validator
# WA ==> OK
# RE ==> NG

$_=<>;
die if not /^\d+\n/ && $_ >= 1 && $_ <= 1000;
$n=$_;
while(<>){
	die if not /^(\d+) (\d+) (\d+)\n/;
	die if not $1 >= 1 && $1 < 1e8;
	die if not $2 >= 1 && $2 < 1e8;
	die if not $3 >= 1 && $3 < 1e8;
	++$c;
}
die if not $c == $n;