编程介的小学生 2019-04-29 12:00 采纳率: 20.5%
浏览 147

星期的一种计算的算法实现,怎么利用C语言的程序的设计的思想去编写代码?

Problem Description
The ACM kingdom has N cities, numbered from 1 to N. The capital is numbered 1. There are N – 1 roads each connecting two cities in the kingdom such that there exactly one path between any pair of cities.

Now the Golden Week Vocation is coming. M travelers living in the capital are going to travel to other cities. Every traveler will start from the capital, and the ith traveler has chosen city Ci as his destination. As a manager of the travel agencies, Mr. Chopsticks decides to assign prices to the roads in the kingdom during the vocation. After some investigation, Mr. Chopsticks has found that every traveler has a budget for his trip, and if the total price of the roads in the path from the capital to his destination city is larger than his budget, he will give up his trip; otherwise he will pay for it to the travel agencies. Mr. Chopsticks wants to assign prices to roads so as to maximize the agencies’ revenue. Could you help him? Each road should be assigned a price between 0 and 1000,000,000 inclusive.

Input
The input begins with an integer T (T<=50), indicating the number of test cases. Each case begins with two integers N and M (2 <= N <= 1000, 1 <= M <= 1000), indicating the number of cities and the number of travelers respectively. Then N – 1 lines follow, where the ith line contains two integers ui and vi (1≤ui,vi≤N) indicating that the ith road connects the cities ui and vi. The next M lines each contain two integers Ci and Bi (1≤Ci≤N,1≤Bi≤1000000000), indicating the ith traveler’s destination and budget respectively.

Output
For each case, output a line containing the maximum revenue, followed by a line containing N – 1 nonnegative integers, separated by one space, in which the ith integer denotes the price of the ith road. If there are multiple optimum solutions, output any of them.

Sample Input
2
2 3
1 2
2 3
2 5
2 9
4 4
1 2
1 3
2 4
2 4
2 7
4 5
3 6

Sample Output
10
5
19
4 6 1

  • 写回答

0条回答 默认 最新

    报告相同问题?

    悬赏问题

    • ¥15 Arcgis相交分析无法绘制一个或多个图形
    • ¥15 seatunnel-web使用SQL组件时候后台报错,无法找到表格
    • ¥15 fpga自动售货机数码管(相关搜索:数字时钟)
    • ¥15 用前端向数据库插入数据,通过debug发现数据能走到后端,但是放行之后就会提示错误
    • ¥30 3天&7天&&15天&销量如何统计同一行
    • ¥30 帮我写一段可以读取LD2450数据并计算距离的Arduino代码
    • ¥15 飞机曲面部件如机翼,壁板等具体的孔位模型
    • ¥15 vs2019中数据导出问题
    • ¥20 云服务Linux系统TCP-MSS值修改?
    • ¥20 关于#单片机#的问题:项目:使用模拟iic与ov2640通讯环境:F407问题:读取的ID号总是0xff,自己调了调发现在读从机数据时,SDA线上并未有信号变化(语言-c语言)