题目描述
This English game is a simple English words connection game.
The rules are as follows: there are N English words in a dictionary, and every word has its own weight v. There is a weight if the corresponding word is used. Now there is a target string X. You have to pick some words in the dictionary, and then connect them to form X. At the same time, the sum weight of the words you picked must be the biggest.
The rules are as follows: there are N English words in a dictionary, and every word has its own weight v. There is a weight if the corresponding word is used. Now there is a target string X. You have to pick some words in the dictionary, and then connect them to form X. At the same time, the sum weight of the words you picked must be the biggest.
输入格式
There are several test cases. For each test, N (1<=n<=1000) and X (the length of x is not bigger than 10000) are given at first. Then N rows follow. Each row contains a word wi (the length is not bigger than 30) and the weight of it. Every word is composed of lowercases. No two words in the dictionary are the same.
输出格式
For each test case, output the biggest sum weight, if you could not form the string X, output -1.
样例输入
1 aaaa a 2 3 aaa a 2 aa 5 aaa 6 4 abc a 1 bc 2 ab 4 c 1 3 abcd ab 10 bc 20 cd 30 3 abcd cd 100 abc 1000 bcd 10000
样例输出
8 7 5 40 -1
比赛公告
题号：1371,1372,1373,1374,1375,1376,1377,1378,1379,1380
点击上方导航栏的训练，点击题库，寻找题号即可找到对应题目，比赛结束后，请通过训练->题库->寻找对应题目的方式做题
因为不确定因素太多，就不再安排大家轮流讲题了，大家做不出题可以在测试结束后去题库找对应的题目看题解，希望大家自觉练习，认真练习，考核测试会采取不同与现在测试的方式，两个月后综合测试成绩不达标者会退出实验室，希望大家认真对待