[ACM] ZOJ 3819 Average Score (水題）

[ACM] ZOJ 3819 Average Score (水題）

Bob is a freshman in Marjar University. He is clever and diligent. However, he is not good at math, especially in Mathematical Analysis.

After a mid-term exam, Bob was anxious about his grade. He went to the professor asking about the result of the exam. The professor said:

"Too bad! You made me so disappointed."

"Hummm... I am giving lessons to two classes. If you were in the other class, the average scores of both classes will increase."

Now, you are given the scores of all students in the two classes, except for the Bob's. Please calculate the possible range of Bob's score. All scores shall be integers within [0, 100].

Input

There are multiple test cases. The first line of input contains an integer T indicating the number of test cases. For each test case:

The first line contains two integers N (2 <= N <= 50) and M (1 <= M <= 50) indicating the number of students in Bob's class and the number of students in the other class respectively.

The next line contains N - 1 integers A₁, A₂, .., A_N-1 representing the scores of other students in Bob's class.

The last line contains M integers B₁, B₂, .., B_M representing the scores of students in the other class.

Output

For each test case, output two integers representing the minimal possible score and the maximal possible score of Bob.

It is guaranteed that the solution always exists.

Sample Input

2
4 3
5 5 5
4 4 3
6 5
5 5 4 5 3
1 3 2 2 1

Sample Output

4 4
2 4

解題思路：

題意為 bob所在的班有n個人，每人都有一個成績，另外一個班有m個人，沒人都有一個成績，如果把bob放到另一個班裡去，那麼兩班的平均分都比原來的班內平均分要高，問符合條件的bob的成績的范圍。枚舉即可。

代碼：

#include 
#include 
using namespace std;
int t;
double a[52];
double b[52];
int n,m;
int bob;
int s,e;

int main()
{
    cin>>t;
    while(t--)
    {
        cin>>n>>m;
        double sum1=0.0;
        double sum2=0.0;
        double pre1,pre2;
        for(int i=1;i<=n-1;i++)
        {
            cin>>a[i];
            sum1+=a[i];
        }
        for(int i=1;i<=m;i++)
        {
            cin>>b[i];
            sum2+=b[i];
        }
        bool first=0;
        for(bob =0;bob<=100;bob++)
        {
            pre1=(sum1+bob)/n;
            pre2=(sum2)/m;
            if((sum1)/(n-1)>pre1&&(sum2+bob)/(m+1)>pre2)
            {
                if(first)
                    e=bob;
                if(!first)
                {
                    s=bob;
                    e=bob;
                }
                first=1;
            }

        }
        cout<