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Description Bessie wants to navigate her spaceship through a dangerous asteroid field in the shape of an N x N grid (1 <= N <= 500). The grid contains 阅读全文
摘要：
Description Stockbrokers are known to overreact to rumours. You have been contracted to develop a method of spreading disinformation amongst the stock 阅读全文
摘要：
Description Freddy Frog is sitting on a stone in the middle of a lake. Suddenly he notices Fiona Frog who is sitting on another stone. He plans to vis 阅读全文