摘要： One-Two-ThreeYour little brother has just learnt to write one, two and three, in English. He has written a lot of those words in a paper, your task is to recognize them. Note that your little brother is only a child, so he may make small mistakes: for each word, there might be at most one wrong lett 阅读全文

摘要： QueenThe ProblemThe game of Chess has several pieces with curious movements. One of them is theQueen, which can move any number of squares in any direction: in the same line, in the same column or in any of the diagonals, as illustrated by the figure below (black dots represent positions the queen m 阅读全文