[USACO Bronze 1] The Great Revegetation
Question A lengthy drought has left Farmer John's N pastures devoid of grass. However, with the rainy season arriving soon, the time has come to "revegetate". In Farmer John's shed, he has four buckets, each with a different type of grass seed. He wishes to sow each pasture with one of these types of seeds. Being a dairy farmer, Farmer John wants to make sure each of his cows has a varied diet. ..