http://poj.org/problem?id=1338 http://poj.org/problem?id=2545 http://poj.org/problem?id=2591 三道水题~~~~题目链接在上： 题意很容易理解，解法需要想一想， 即通过维护三个队列，来产生一个带有ans到数组。 以下是代码： poj1338： #include <cst

题目链接：POJ UVA 题目大意： Ugly numbers are numbers whose only prime factors are 2, 3 or 5. The sequence 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, … shows the first 10 ugly numbers. By convention, 1 is included. 把