• B. Order Book(Codeforces Round #317 )


    B. Order Book
    time limit per test
    2 seconds
    memory limit per test
    256 megabytes
    input
    standard input
    output
    standard output

    In this task you need to process a set of stock exchange orders and use them to create order book.

    An order is an instruction of some participant to buy or sell stocks on stock exchange. The order number i has price pi, direction di — buy or sell, and integer qi. This means that the participant is ready to buy or sell qi stocks at price pi for one stock. A value qi is also known as a volume of an order.

    All orders with the same price p and direction d are merged into one aggregated order with price p and direction d. The volume of such order is a sum of volumes of the initial orders.

    An order book is a list of aggregated orders, the first part of which contains sell orders sorted by price in descending order, the second contains buy orders also sorted by price in descending order.

    An order book of depth s contains s best aggregated orders for each direction. A buy order is better if it has higher price and a sell order is better if it has lower price. If there are less than s aggregated orders for some direction then all of them will be in the final order book.

    You are given n stock exhange orders. Your task is to print order book of depth s for these orders.

    Input

    The input starts with two positive integers n and s (1 ≤ n ≤ 1000, 1 ≤ s ≤ 50), the number of orders and the book depth.

    Next n lines contains a letter di (either 'B' or 'S'), an integer pi (0 ≤ pi ≤ 105) and an integer qi (1 ≤ qi ≤ 104) — direction, price and volume respectively. The letter 'B' means buy, 'S' means sell. The price of any sell order is higher than the price of any buy order.

    Output

    Print no more than 2s lines with aggregated orders from order book of depth s. The output format for orders should be the same as in input.

    Sample test(s)
    input
    6 2
    B 10 3
    S 50 2
    S 40 1
    S 50 6
    B 20 4
    B 25 10
    
    output
    S 50 8
    S 40 1
    B 25 10
    B 20 4
    
    Note

    Denote (x, y) an order with price x and volume y. There are 3 aggregated buy orders (10, 3), (20, 4), (25, 10) and two sell orders (50, 8), (40, 1) in the sample.

    You need to print no more than two best orders for each direction, so you shouldn't print the order (10 3) having the worst price among buy orders.




    #include <iostream>
    #include <stdio.h>
    #include <string.h>
    #include <stdlib.h>
    #include <algorithm>
    
    using namespace std;
    
    int n,m;
    int buy[100100];
    int sell[100100];
    
    int main()
    {
        while(scanf("%d%d",&n,&m)!=EOF){
            memset(buy,0,sizeof(buy));
            memset(sell,0,sizeof(sell));
            char str[11];
            int x,y;
            for(int i=0;i<n;i++){
               scanf("%s%d%d",str,&x,&y);
               if(strcmp(str,"B") == 0){
                   buy[x] += y;
               }else{
                    sell[x] += y;
               }
            }
            int t = 0;
            int p = 0;
            for(int i=0;i<=100000;i++)
            {
                if(t<m && sell[i]){
                    t++;
                    p = i;
                }else if(t>=m){
                    break;
                }
            }
            for(int i=p;i>=0;i--){
                if(sell[i]){
                    printf("S %d %d
    ",i,sell[i]);
                    t++;
                }
            }
            t = 0;
            for(int i=100000;i>=0;i--){
                if(t<m && buy[i]){
                    printf("B %d %d
    ",i,buy[i]);
                    t++;
                }else if(t>=m){
                    break;
                }
            }
        }
        return 0;
    }


  • 相关阅读:
    C++数组释放问题
    C# 线程与进程
    Inspector面板Debug模式
    Unity实现汉诺塔游戏
    Unity中的销毁方法
    如何修改Unity中脚本模板
    序列帧动画
    Unity中的射线和射线图层过滤使用方法
    简单第一人称射击游戏
    C# 集合和泛型
  • 原文地址:https://www.cnblogs.com/zsychanpin/p/6883254.html
Copyright © 2020-2023  润新知