HDU1789Doing Homework again（贪心）

Problem Description

Ignatius has just come back school from the 30th ACM/ICPC. Now he has a lot of homework to do. Every teacher gives him a deadline of handing in the homework. If Ignatius hands in the homework after the deadline, the teacher will reduce his score of the final test. And now we assume that doing everyone homework always takes one day. So Ignatius wants you to help him to arrange the order of doing homework to minimize the reduced score.

Input

The input contains several test cases. The first line of the input is a single integer T that is the number of test cases. T test cases follow.
Each test case start with a positive integer N(1<=N<=1000)
which indicate the number of homework.. Then 2 lines follow. The first line
contains N integers that indicate the deadlines of the subjects, and the next
line contains N integers that indicate the reduced scores.

Output

For each test case, you should output the smallest total
reduced score, one line per test case.

Sample Input

3
3
3 3 3
10 5 1
3
1 3 1
6 2 3
7
1 4 6 4 2 4 3
3 2 1 7 6 5 4

Sample Output

0
3
5

Author

lcy

Source

2007省赛集训队练习赛（10）_以此感谢DOOMIII

#include<stdio.h>
#include<math.h>
#include<stdlib.h>
#include<string.h>
#include<algorithm>
using namespace std;
const int maxn=+;
struct node{
    int dl,sco;
    bool flag;//flag表示可以完成
}a[maxn];
bool cmp(node a1,node a2){
    if(a1.dl!=a2.dl)return a1.dl<a2.dl;
    else return a1.sco>a2.sco;
}
int main()
{
    int N,n,i;
    scanf("%d",&N);
    while(N--)
    {
        scanf("%d",&n);
        for(i=;i<n;i++)scanf("%d",&a[i].dl);
        for(i=;i<n;i++)scanf("%d",&a[i].sco);
        for(i=;i<n;i++)a[i].flag=true;
        sort(a,a+n,cmp);
        int day=,res=;
        for(i=;i<n;i++)
        {
            if(a[i].dl>=day){
                day++;
                continue;
            }
            int p=a[i].sco,pos=i;
            for(int j=;j<i;j++)
            {
            if(a[j].sco<p&&a[j].flag==)
            {
                p=a[j].sco;
                pos=j;
            }
            }
            res+=p;
            a[pos].flag=;
        }
        printf("%d\n",res);
    }
    return ;
}