杭电 HDU ACM Milk

Milk

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 15697    Accepted Submission(s): 3947

Problem Description

Ignatius drinks milk everyday, now he is in the supermarket and he wants to choose a bottle of milk. There are many kinds of milk in the supermarket, so Ignatius wants to know which kind of milk is the cheapest.

Here are some rules:
1. Ignatius will never drink the milk which is produced 6 days ago or earlier. That means if the milk is produced 2005-1-1, Ignatius will never drink this bottle after 2005-1-6(inclusive).
2. Ignatius drinks 200mL milk everyday.
3. If the milk left in the bottle is less than 200mL, Ignatius will throw it away.
4. All the milk in the supermarket is just produced today.

Note that Ignatius only wants to buy one bottle of milk, so if the volumn of a bottle is smaller than 200mL, you should ignore it.
Given some information of milk, your task is to tell Ignatius which milk is the cheapest.

 

Input

The input contains several test cases. The first line of the input is a single integer T which is the number of test cases. T test cases follow.
Each test case starts with a single integer N(1<=N<=100) which is the number of kinds of milk. Then N lines follow, each line contains a string S(the length will at most 100 characters) which indicate the brand of milk, then two integers for the brand: P(Yuan) which is the price of a bottle, V(mL) which is the volume of a bottle.

 

Output

For each test case, you should output the brand of the milk which is the cheapest. If there are more than one cheapest brand, you should output the one which has the largest volume.

 

Sample Input

    
    
    
    

     
     
     
     2
2
Yili 10 500
Mengniu 20 1000
4
Yili 10 500
Mengniu 20 1000
Guangming 1 199
Yanpai 40 10000
    
    
    
    

 

Sample Output

    
    
    
    

     
     
     
     Mengniu
Mengniu


     
     
     
     
 
      
 
       Hint 
      
In the first case, milk Yili can be drunk for 2 days, it costs 10 Yuan. Milk Mengniu can be drunk for 5 days, it costs 20 Yuan. So Mengniu is the cheapest.In the second case, milk Guangming should be ignored. Milk Yanpai can be drunk for 5 days, but it costs 40 Yuan. So Mengniu is the cheapest. 
     
     
     
     
     

         
     
     
     
     
     

       这个题目当时acm入门的时候，怎么也解决不了 。大水题一直搁置到现在。现在闲着没事干，a它分分秒。看着曾经提交的code，代码质量令今天的我非常是感概。 
      
 
      
又臭又长。而且回忆起曾经解这个题目时遇到的思路问题，感觉acm确实能给人带来思维上的强大进步，特别特别明显。
 
      
想问题也想的非常清楚。事实上这个题目就是简单的把问题划分清楚就ok了，同一时候注意点儿细节。
 
     
     
     
     
     
 
      
#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
struct ls
{
    string str;
    int mo;
    int ml;
    double rate;
} gq[1000];
bool cmp(ls co,ls cn)
{
    return co.rate<cn.rate;
}
int main()
{
    int T,n;
    cin>>T;
    while(T--)
    {
        cin>>n;
        for(int i=0; i<n; i++)
        {
            cin>>gq[i].str>>gq[i].mo>>gq[i].ml;

            if(gq[i].ml>=1200)
                gq[i].rate=gq[i].mo/5;
            else if((gq[i].ml>=200))
            {
                int x=(gq[i].ml)/200;
                gq[i].rate=gq[i].mo/double(x*1.0);
            }
            else
                gq[i].rate=-1;
        }
        double Min=0x1f1f1f1f;
        int k;
        for(int j=0; j<n; j++)
        {
            if(gq[j].rate!=-1)
            {
                if(gq[j].rate<Min)
                {
                    Min=gq[j].rate;
                    k=j;
                }
            }
        }
        cout<<gq[k].str<<endl;
    }
    return 0;
}
/*
2
2
Yili 10 500
Mengniu 20 1000
4
Yili 10 600
Mengniu 20 1000
Guangming 1 199
Yanpai 40 10000
**/