摘要：Twilight Sparkle was playing Ludo with her friends Rainbow Dash, Apple Jack and Flutter Shy. But she kept losing. Having returned to the castle, Twili... 阅读全文

摘要：One day, Twilight Sparkle is interested in how to sort a sequence of integersa1, a2, ..., anin non-decreasing order. Being a young unicorn, the only o... 阅读全文

摘要：Twilight Sparkle once got a crystal from the Crystal Mine. A crystal of size n (n is odd; n > 1) is an n × n matrix with a diamond inscribed into it.Y... 阅读全文