zoukankan      html  css  js  c++  java
  • 1090. Highest Price in Supply Chain (25)

    A supply chain is a network of retailers(零售商), distributors(经销商), and suppliers(供应商)-- everyone involved in moving a product from supplier to customer.

    Starting from one root supplier, everyone on the chain buys products from one's supplier in a price P and sell or distribute them in a price that is r% higher than P. It is assumed that each member in the supply chain has exactly one supplier except the root supplier, and there is no supply cycle.

    Now given a supply chain, you are supposed to tell the highest price we can expect from some retailers.

    Input Specification:

    Each input file contains one test case. For each case, The first line contains three positive numbers: N (<=105), the total number of the members in the supply chain (and hence they are numbered from 0 to N-1); P, the price given by the root supplier; and r, the percentage rate of price increment for each distributor or retailer. Then the next line contains N numbers, each number Si is the index of the supplier for the i-th member. Sroot for the root supplier is defined to be -1. All the numbers in a line are separated by a space.

    Output Specification:

    For each test case, print in one line the highest price we can expect from some retailers, accurate up to 2 decimal places, and the number of retailers that sell at the highest price. There must be one space between the two numbers. It is guaranteed that the price will not exceed 1010.

    Sample Input:

    9 1.80 1.00
    1 5 4 4 -1 4 5 3 6
    

    Sample Output:

    1.85 2
    #include<cstdio>
    #include<vector>
    #include<cmath>
    using namespace std;
    const int maxn = 100010;
    struct Node{
        vector<int> child;
    }node[maxn];
    
    int n,maxdepth = 0,num = 0;
    double p,r;
    
    void DFS(int index,int depth){
        if(node[index].child.size() == 0){
        //    printf("yezi %d
    ",depth);
            if(depth > maxdepth){
                maxdepth = depth;
                num = 1;
            }else if(depth == maxdepth){
                num++;
            }
            return;
        }
        for(int i = 0; i < node[index].child.size(); i++){
        //    printf("jiedian %d
    ",node[index].child[i]);
            DFS(node[index].child[i],depth + 1);
        }
    }
    int main(){
        int father,root;
        scanf("%d%lf%lf",&n,&p,&r); //p是价格,r是增长率
        r /= 100;
        for(int i = 0; i < n; i++){
            scanf("%d",&father);
            if(father == -1) root = i;
            else{
                node[father].child.push_back(i);
            }        
        } 
        DFS(root,0);
        printf("%.2f %d",p * pow(1 + r,maxdepth),num);
        return 0;
    } 
  • 相关阅读:
    ImportError: Matplotlib qt-based backends require an external PyQt4, PyQt5, PySide or PySide2 package to be installed, but it was not found.
    cannot load library 'libportaudio.so.2': libportaudio.so.2: cannot open shared object file: No such file or directory
    如何解决Linux系统下pyaudio安装缺少文件问题error: portaudio.h: 没有那个文件或目录
    完美解决 python ImportError: Failed to import any qt binding
    Linux傻瓜式四步完美安装Python3.7
    为什么诺贝尔奖得主很少有中国人?
    Web前端入门知识
    MySQL通用编程
    其实我想做个诗人
    八皇后问题Python实现
  • 原文地址:https://www.cnblogs.com/wanghao-boke/p/8572275.html
Copyright © 2011-2022 走看看