Elijahqi

http://www.elijahqi.win/archives/1138 Description Your task is to divide a number of persons into two teams, in such a way, that: everyone belongs to one of the teams; every team has at least one...

http://www.elijahqi.win/archives/1145 题目描述 Tom最近在研究一个有趣的排序问题。如图所示，通过2个栈S1和S2，Tom希望借助以下4种操作实现将输入序列升序排序。 操作a 如果输入序列不为空，将第一个元素压入栈S1 操作b 如果栈S1不为空，将S1栈顶元素弹出至输出序列 操作c 如果输入序列不为空，将第一个元素压入栈S2 操作d 如果...

http://www.elijahqi.win/archives/1151 One day student Vasya was sitting on a lecture and mentioned a string s1s2… sn, consisting of letters “a”, “b” and “c” that was written on his desk. As the lectu...

http://www.elijahqi.win/archives/1154 Recently, Pari and Arya did some research about NP-Hard problems and they found the minimum vertex cover problem very interesting. Suppose the graph G is given...

http://www.elijahqi.win/archives/3598 Description Being a knight is a very attractive career: searching for the Holy Grail, saving damsels in distress, and drinking with the other knights are fun th...