1042B. Vitamins
Berland shop sells nn kinds of juices. Each juice has its price cici. Each juice includes some set of vitamins in it. There are three types of vitamins: vitamin "A", vitamin "B" and vitamin "C". Each juice can contain one, two or all three types of vitamins in it.
Petya knows that he needs all three types of vitamins to stay healthy. What is the minimum total price of juices that Petya has to buy to obtain all three vitamins? Petya obtains some vitamin if he buys at least one juice containing it and drinks it.
The first line contains a single integer nn (1≤n≤1000)(1≤n≤1000) — the number of juices.
Each of the next nn lines contains an integer cici (1≤ci≤100000)(1≤ci≤100000) and a string sisi — the price of the ii-th juice and the vitamins it contains. String sisi contains from 11 to 33 characters, and the only possible characters are "A", "B" and "C". It is guaranteed that each letter appears no more than once in each string sisi. The order of letters in strings sisi is arbitrary.
Print -1 if there is no way to obtain all three vitamins. Otherwise print the minimum total price of juices that Petya has to buy to obtain all three vitamins.
4
5 C
6 B
16 BAC
4 A
15
2
10 AB
15 BA
-1
5
10 A
9 BC
11 CA
4 A
5 B
13
6
100 A
355 BCA
150 BC
160 AC
180 B
190 CA
250
2
5 BA
11 CB
16
In the first example Petya buys the first, the second and the fourth juice. He spends 5+6+4=155+6+4=15 and obtains all three vitamins. He can also buy just the third juice and obtain three vitamins, but its cost is 1616, which isn't optimal.
In the second example Petya can't obtain all three vitamins, as no juice contains vitamin "C".
只有ABC三位,如果按位或是不错的选择
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <set>
#include <queue>
#include <map>
#include <sstream>
#include <cstdio>
#include <cstring>
#include <numeric>
#include <cmath>
#include<unordered_set>
#define ll long long
using namespace std;
int dir[][] = { {,},{-,},{,},{,-} }; int main()
{
map<string,int> mp;
int n;
cin >> n;
vector<int> dp(,1e9);
dp[] = ;
while (n--)
{
int cost;
string vit;
cin >> cost >> vit;
int m = ;
for (int i = ; i < vit.size(); i++)
m |= << (vit[i] - 'A');
for (int i = ; i < ; i++)
{
dp[i | m] = min(dp[i | m], dp[i] + cost);
}
}
if (dp[] == 1e9)
dp[] = -;
cout << dp[];
//system("pause");
return ;
}
1042B. Vitamins的更多相关文章
- CodeForces - 1042B
Berland shop sells nn kinds of juices. Each juice has its price cici. Each juice includes some set o ...
- Codeforces Round #510 (Div. 2) B. Vitamins
B. Vitamins 题目链接:https://codeforces.com/contest/1042/problem/B 题意: 给出几种药,没种可能包含一种或多种(最多三种)维生素,现在问要吃到 ...
- Gym - 101243F Vitamins(思维+并查集)
题意 有三种药丸,白色W>红色R>蓝色B,给你m个约束条件,问你n个药丸的颜色,不能确定颜色输出‘?’ 题解 如果1<2<3,只要找到2就能确定1和3的颜色 如果2=4,只要确 ...
- 【枚举】【并查集】Gym - 101243F - Vitamins
题意:有n片药,有三种颜色,白色比红色重,红色比蓝色重,给你一些它们之间的重量关系,比如1>3,2=4之类,问你它们的颜色,如果没法判断的输出?. 先并查集把等于号全缩起来,然后按照大于号建图, ...
- CF1042B 【Vitamins】(去重,状压搜索)
由题意,我们其实会发现 对于每一种果汁,其对应的状态只有可能有7种 VA VB VC VA+VB VA+VC VB+VC VA+VB+VC 这道题就大大简化了 我们把所有果汁都读进来 每种 ...
- 2018SDIBT_国庆个人第三场
A - A CodeForces - 1042A There are nn benches in the Berland Central park. It is known that aiai peo ...
- 《利用python进行数据分析》读书笔记--第七章 数据规整化:清理、转换、合并、重塑(三)
http://www.cnblogs.com/batteryhp/p/5046433.html 5.示例:usda食品数据库 下面是一个具体的例子,书中最重要的就是例子. #-*- encoding: ...
- HTML & CSS 小总结
1. web 主机代理商 web hosting company, 让他们的服务器为你的页面服务2. 选择网站名字 例如: www.1234.com3. 寻找 把文件从电脑传到主机的途径4. 把新网站 ...
- Diet
Dialogue 1 Healthy diet 关于健康饮食 F:Bob, look at this sentence. 'Healthy eating is not about strict n ...
随机推荐
- 安装 centos8.1
阿里云镜像下载链接 http://mirrors.aliyun.com/centos/8.1.1911/isos/x86_64/ 选择 CentOS-8.1.1911-x86_64-dvd1.iso ...
- LED Keychain: Timeless Business Gift
Every business owner understands the importance of reducing marketing budgets and investing in sales ...
- Python 类方法、实例方法、静态方法的使用与及实例
类方法 使用装饰器@classmethod 第一个参数必须是当前类对象,该参数名一般约定为“cls” (可修改但不建议)通过他来传递类的属性和方法(不能传实例的属性和方法) 调用:实例对象和类对象多可 ...
- [HNOI2001] 求正整数 - 背包dp,数论
对于任意输入的正整数n,请编程求出具有n个不同因子的最小正整数m. Solution (乍一看很简单却搞了好久?我真是太菜了) 根据因子个数计算公式 若 \(m = \prod p_i^{q_i}\) ...
- Spring boot unable to determine jdbc url from datasouce
1. 首先删除 @EnableAutoConfiguration(exclude = {DataSourceAutoConfiguration.class}) 2. 在配置文件里添加完整的dataso ...
- SpringBoot学习- 3、整合MyBatis
SpringBoot学习足迹 1.下载安装一个Mysql数据库及管理工具,同类工具很多,随便找一个都可以,我在windows下做测试项目习惯使用的是haosql 它内部集成了MySql-Front管理 ...
- lib目录和maven dependency目录的jar包冲突
用eclipse时新建项目时,会在lib目录下自动生成一些jar包,然后又在pom.xml文件中添加了依赖,导致lib下的jar包和maven dependency目录下的jar包产生了冲突.刚开始r ...
- OpenGL 编程指南 (3.1)
1.OpenGL使用的是RGB颜色空间,例如三个颜色分量各占8位,那么就说这个颜色值色深24,能够表示2^24中颜色. 2.多重采样是基于采样的抗锯齿技术,有OGAA(ordered grid ant ...
- 小根堆(Heap)的详细实现
堆的介绍 Heap是一种数据结构具有以下的特点: 1)完全二叉树 2)heap中存储的值是偏序 Min-heap: 父节点的值小于或等于子节点的值 Max-heap: 父节点的值大于或等于子节点的值 ...
- 排队看病(PriorityQueue自定义排序)
看病要排队这个是地球人都知道的常识. 不过经过细心的0068的观察,他发现了医院里排队还是有讲究的.0068所去的医院有三个医生(汗,这么少)同时看病.而看病的人病情有轻重,所以不能根据简单的先来先服 ...