There are n chickens in a farmyard. For each pair of distinct chickens, either the first pecks the second or the second pecks the first, but not both. We say that chicken u virtually pecks chicken v if either:
There are n chickens in a farmyard. For each pair of distinct chickens, either the first pecks the second or the second pecks the first, but not both. We say that chicken u virtually pecks chicken v if either: