zoukankan      html  css  js  c++  java
  • HDU 1260:Tickets(DP)

    Tickets

    Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
    Total Submission(s): 7925    Accepted Submission(s): 4032

    Problem Description

    Jesus, what a great movie! Thousands of people are rushing to the cinema. However, this is really a tuff time for Joe who sells the film tickets. He is wandering when could he go back home as early as possible.
    A good approach, reducing the total time of tickets selling, is let adjacent people buy tickets together. As the restriction of the Ticket Seller Machine, Joe can sell a single ticket or two adjacent tickets at a time.
    Since you are the great JESUS, you know exactly how much time needed for every person to buy a single ticket or two tickets for him/her. Could you so kind to tell poor Joe at what time could he go back home as early as possible? If so, I guess Joe would full of appreciation for your help.

    Input

    There are N(1<=N<=10) different scenarios, each scenario consists of 3 lines:
    1) An integer K(1<=K<=2000) representing the total number of people;
    2) K integer numbers(0s<=Si<=25s) representing the time consumed to buy a ticket for each person;
    3) (K-1) integer numbers(0s<=Di<=50s) representing the time needed for two adjacent people to buy two tickets together.

    Output

    For every scenario, please tell Joe at what time could he go back home as early as possible. Every day Joe started his work at 08:00:00 am. The format of time is HH:MM:SS am|pm.

    Sample Input

    2
    2
    20 25
    40
    1
    8
    

    Sample Output

    08:00:40 am
    08:00:08 am

    题意

    n个人排队买票,每次卖票可以卖给一个人,也可以卖给相邻的两个人,卖给一个人所花费的时间为a,卖给两个人花费的时间为b,求这些人全部买到票所需要的最少时间

    思路

    因为是求最少时间,保证每次状态是从第0个人转移来的,给dp[0]赋值为0,dp[1]的值为a[1]

    状态转移方程:dp[i]=min(dp[i-1]+a[i],dp[i-2]+b[i-1])

    AC代码

    #include<bits/stdc++.h>
    #define  ll long long
    #define ms(a) memset(a,0,sizeof(a))
    using namespace std;
    const int maxn=1e6+10;
    int a[maxn];
    int b[maxn];
    int dp[maxn];
    int main()
    {
        int t;
        int n;
        scanf("%d",&t);
        while(t--) {
            ms(a);
            ms(b);
            ms(dp);
            scanf("%d", &n);
            for (int i = 1; i <= n; i++)
                scanf("%d", &a[i]);
            for (int i = 1; i < n; i++)
                scanf("%d", &b[i]);
            dp[0] = 0;
            dp[1] = a[1];
            for (int i = 1; i <= n; i++)
                dp[i] += min(dp[i - 1] + a[i], dp[i - 2] + b[i-1]);
            int h = dp[n] / 3600 + 8;
            int mi = dp[n] / 60 % 60;
            int se = dp[n] % 60;
            printf("%02d:%02d:%02d ", h, mi, se);
            if (h > 12)
                printf("pm
    ");
            else
                printf("am
    ");
        }
        return 0;
    }
  • 相关阅读:
    【java】i++与++i、i--运算
    配置ssh框架启动tomcat服务器报异常Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
    jsp页面第一句话报这个错Syntax error, insert "}" to complete
    oracle忘记密码用户名被锁定_解决方案
    关于c#的单例模式,static 变量,下面一篇很不错
    Entity Framework 冲突检测,这一篇我看了比较明了
    关于lambda表达式与使用局部变量的作用域问题,下面这篇不错
    C# SelectMany 的使用
    UML类图 入门 (转载)
    VS code key shortcuts for windows
  • 原文地址:https://www.cnblogs.com/Friends-A/p/10324387.html
Copyright © 2011-2022 走看看