shithub: kwa

ref: 703960d83de310d26c273c79c2f9abdd645e1eda
dir: /test/t.randk/

{
	k = 2
	n = NF
	i = 1
	while ( i <= n ) {
		if ( rand() < k/n ) {
			print i
			k--
		}
		n--
		i++
	}
}