Fivefold Removals Alice and Bob are playing a simple game on marbles. They have a bucket containing N marbles, and the... |
Joker's GCD Test Joker has a sequence P of n integers. Each two elements in the sequence are pairwise distinct. He de... |
Up You Go Arya is taking part in a game of throwing marbles upwards. There are n participants in this game in ...
Moderate
8/14/79 |