魔法宝石 Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 254 Accepted Submission(s): 85 Problem Description 小s想要创造n种魔法宝石.小s可以用ai的魔力值创造一棵第i种魔法宝石,或是使用两个宝石合成另一种宝石(不消耗魔力值).请你帮小s算出合成某种宝石的所需的最小花费. Input 第一行…
One way that the police finds the head of a gang is to check people's phone calls. If there is a phone call between A and B, we say that A and B is related. The weight of a relation is defined to be the total time length of all the phone calls made b…