• D. Magic Box(几何)


    One day Vasya was going home when he saw a box lying on the road. The box can be represented as a rectangular parallelepiped. Vasya needed no time to realize that the box is special, as all its edges are parallel to the coordinate axes, one of its vertices is at point (0, 0, 0), and the opposite one is at point (x1, y1, z1). The six faces of the box contain some numbers a1, a2, ..., a6, exactly one number right in the center of each face.

    The numbers are located on the box like that:

    • number a1 is written on the face that lies on the ZOX plane;
    • a2 is written on the face, parallel to the plane from the previous point;
    • a3 is written on the face that lies on the XOY plane;
    • a4 is written on the face, parallel to the plane from the previous point;
    • a5 is written on the face that lies on the YOZ plane;
    • a6 is written on the face, parallel to the plane from the previous point.

    At the moment Vasya is looking at the box from point (x, y, z). Find the sum of numbers that Vasya sees. Note that all faces of the box are not transparent and Vasya can't see the numbers through the box. The picture contains transparent faces just to make it easier to perceive. You can consider that if Vasya is looking from point, lying on the plane of some face, than he can not see the number that is written on this face. It is enough to see the center of a face to see the corresponding number for Vasya. Also note that Vasya always reads correctly the ai numbers that he sees, independently of their rotation, angle and other factors (that is, for example, if Vasya sees some ai = 6, then he can't mistake this number for 9 and so on).

    Input

    The fist input line contains three space-separated integers xy and z (|x|, |y|, |z| ≤ 106) — the coordinates of Vasya's position in space. The second line contains three space-separated integers x1y1z1 (1 ≤ x1, y1, z1 ≤ 106) — the coordinates of the box's vertex that is opposite to the vertex at point (0, 0, 0). The third line contains six space-separated integers a1, a2, ..., a6 (1 ≤ ai ≤ 106) — the numbers that are written on the box faces.

    It is guaranteed that point (x, y, z) is located strictly outside the box.

    Output

    Print a single integer — the sum of all numbers on the box faces that Vasya sees.

    Example

    Input
    2 2 2
    1 1 1
    1 2 3 4 5 6
    Output
    12
    Input
    0 0 10
    3 2 3
    1 2 3 4 5 6
    Output
    4

    Note

    The first sample corresponds to perspective, depicted on the picture. Vasya sees numbers a2 (on the top face that is the darkest), a6 (on the right face that is the lightest) and a4 (on the left visible face).

    In the second sample Vasya can only see number a4.

    本来是用暴力来接的解出来了,但是今天看了被人的代码,发现这道题其实很简洁,怎么说呢,还是想不到那么好的办法,不过看过之后能够想到还是很值得的

    #include<cstdio>  
    int main()  
    {  
        int x,y,z,x1,y1,z1;  
        int a1,a2,a3,a4,a5,a6;  
        scanf("%d %d %d",&x,&y,&z);  
        scanf("%d %d %d",&x1,&y1,&z1);  
        scanf("%d %d %d %d %d %d",&a1,&a2,&a3,&a4,&a5,&a6);  
        int ans=0;  
        if(x<0) ans+=a5;  
        if(x>x1) ans+=a6;  
        if(y<0) ans+=a1;  
        if(y>y1) ans+=a2;  
        if(z<0) ans+=a3;  
        if(z>z1) ans+=a4;  
        printf("%d
    ",ans);  
        return 0;  
     }
    

      

    永远渴望,大智若愚(stay hungry, stay foolish)
  • 相关阅读:
    ThinkPHP 3.2 调用自定义函数库
    phpstorm 2017版代码提示功能开启解决方案
    phpstorm 2017激活
    JavaScript返回上一页和返回上一级页面并刷新
    PHP处理Ajax请求与Ajax跨域
    13个能快速开发android的经典项目
    分享6款优秀的 AR/VR 开源库
    Android-----购物车(包含侧滑删除,商品筛选,商品增加和减少,价格计算,店铺分类等)
    Android------视频播放器(包含全屏播放,快退,快进,腾讯新闻的列表播放等)
    吴恩达课后作业学习2-week1-2正则化
  • 原文地址:https://www.cnblogs.com/h-hkai/p/7631666.html
Copyright © 2020-2023  润新知