摘要：
链接： https://vjudge.net/problem/POJ 3678 题意： Katu Puzzle is presented as a directed graph G(V, E) with each edge e(a, b) labeled by a boolean operator 阅读全文
摘要：
链接： https://vjudge.net/problem/POJ 3683 题意： John is the only priest in his town. September 1st is the John's busiest day in a year because there is an 阅读全文