ZOJ3778：Talented Chef

As we all know, Coach Gao is a talented chef, because he is able to cook M dishes in the same time. Tonight he is going to have a hearty dinner with his girlfriend at his home. Of course, Coach Gao is going to cook all dishes himself, in order to show off his genius cooking skill to his girlfriend.

To make full use of his genius in cooking, Coach Gao decides to prepare N dishes for the dinner. The i-th dish contains A_i steps. The steps of a dish should be finished sequentially. In each minute of the cooking,Coach Gao can choose at most M different dishes and finish one step for each dish chosen.

Coach Gao wants to know the least time he needs to prepare the dinner.

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 and M (1 <= N, M <= 40000). The second line contains N integers A_i (1 <= A_i <= 40000).

Output

For each test case, output the least time (in minute) to finish all dishes.

Sample Input

2
3 2
2 2 2
10 6
1 2 3 4 5 6 7 8 9 10

Sample Output

3
10

首先可以確定在m>=n，輸出的就是maxn

因為在sum足夠的情況下，每天必定要減少m，所以算出平均需要的天數，ans = sum/m，在不能整除的情況下，ans還要+1

算出的平均如果小於maxn，那麼結果當然還是maxn，否則就是答案了

#include 
#include 
#include 
using namespace std;

int main()
{
    int t,n,m,maxn,sum,a,i;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d%d",&n,&m);
        maxn = sum = 0;
        for(i = 0; i=n)
            printf("%d\n",maxn);
        else
            printf("%d\n",ans);
    }

    return 0;
}