摘要： You are supposed to implement the functions of account "Log in" and "Register" for the most popular instant messager QQ. The most challenging part is 阅读全文

摘要： Given any permutation of the numbers {0, 1, 2,..., N−1}, it is easy to sort them in increasing order. But what if Swap(0, *) is the ONLY operation tha 阅读全文

摘要： Given the relations of all the activities of a project, you are supposed to find the earliest completion time of the project. Input Specification: Eac 阅读全文

摘要： This time let us consider the situation in the movie "Live and Let Die" in which James Bond, the world's most famous spy, was captured by a group of d 阅读全文

摘要： This time let us consider the situation in the movie "Live and Let Die" in which James Bond, the world's most famous spy, was captured by a group of d 阅读全文

摘要： With highways available, driving a car from Hangzhou to any other city is easy. But since the tank capacity of a car is limited, we have to find gas s 阅读全文