编程介的小学生 2020-02-07 22:44 采纳率: 20.5%
浏览 71

Hunters 的程序的设计

Problem Description
Alice and Bob are the topmost hunters in the forest, so no preys can escape from them. However, they both think that its hunting skill is better than the other. So they need a match.
In their match, the targets are two animals, a tiger and a wolf. They both know that the tiger is living in the south of the forest and the wolf is living in the north of the forest. They decide that the one who kills the tiger scores X points and who kills the wolf scores Y points. If the one who kills both tiger and wolf scores X+Y points.
Before the match starts, Alice is in the east of the forest and Bob is in the west of the forest. When the match starts, Alice and Bob will choose one of the preys as targets. Because they haven't known the other's choice, maybe they choose the same target. There will be two situations:
(1) If they choose different targets, they both are sure of killing their respective targets.
(2) If they choose the same target, the probability of Alice killing the target is P, and the probability of Bob killing it is 1-P. Then they will hunt for the other prey, also the probability of Alice killing it is P and the probability of Bob killing it is 1-P.
But Alice knows about Bob. She knows that the probability of Bob choosing tiger as his first target is Q, and the probability of choosing wolf is 1-Q. So that Alice can decide her first target to make her expected score as high as possible.

Input
The first line of input contains an integer T (1≤T≤10000), the number of test cases.
Then T test cases follow. Each test case contains X, Y, P, Q in one line. X and Y are integers and 1≤X, Y≤1000000000. P and Q are decimals and 0≤P, Q≤1, and there are at most two digits after decimal point.

Output
For each test case, output the target Alice should choose and the highest expected score she can get, in one line, separated by a space. The expected score should be rounded to the fourth digit after decimal point. It is guaranteed that Alice will have different expected score between choosing tiger and wolf.

Sample Input
3
2 1 0.5 0.5
2 1 0 1
7 7 0.32 0.16

Sample Output
tiger 1.7500
wolf 1.0000
tiger 6.5968

  • 写回答

0条回答 默认 最新

    报告相同问题?

    悬赏问题

    • ¥15 使用Jdk8自带的算法,和Jdk11自带的加密结果会一样吗,不一样的话有什么解决方案,Jdk不能升级的情况
    • ¥15 画两个图 python或R
    • ¥15 在线请求openmv与pixhawk 实现实时目标跟踪的具体通讯方法
    • ¥15 八路抢答器设计出现故障
    • ¥15 opencv 无法读取视频
    • ¥15 用matlab 实现通信仿真
    • ¥15 按键修改电子时钟,C51单片机
    • ¥60 Java中实现如何实现张量类,并用于图像处理(不运用其他科学计算库和图像处理库))
    • ¥20 5037端口被adb自己占了
    • ¥15 python:excel数据写入多个对应word文档