hud 6227 Rabbits

Rabbits

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)
Total Submission(s): 439    Accepted Submission(s): 256

Problem Description

Here N (N ≥ 3) rabbits are playing by the river. They are playing on a number line, each occupying a different integer. In a single move, one of the outer rabbits jumps into a space between any other two. At no point may two rabbits occupy the same position.
Help them play as long as possible

 

Input

The input has several test cases. The first line of input contains an integer t (1 ≤ t ≤ 500) indicating the number of test cases.
For each case the first line contains the integer N (3 ≤ N ≤ 500) described as above. The second line contains n integers a1 < a2 < a3 < ... < aN which are the initial positions of the rabbits. For each rabbit, its initial position
ai satisfies 1 ≤ ai ≤ 10000.

 

Output

For each case, output the largest number of moves the rabbits can make.

 

Sample Input

533 4 632 3 533 5 941 2 3 441 2 4 5

 

Sample Output

11301

 

Source

2017ACM/ICPC亚洲区沈阳站-重现赛（感谢东北大学）

 

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代码：

#include<iostream>#include<algorithm>using namespace std;int main(){    int t,n,a[510],b[510],x;    cin>>t;    while(t--)    {        int sum=0;        cin>>n;        for(int i=0;i<n;i++)            cin>>a[i];        for(int i=0;i<n-1;i++)        {            b[i]=a[i+1]-a[i]-1;            sum+=b[i];        }        x=min(b[0],b[n-2]);        cout<<sum-x<<endl;    }    return 0;}

刚开始看错题意了。这里说的外边是指最外边两个数！！！

如： 1  2  3  4  5  6  7  8  9  10  11

1->(3,11)：2+4=6;

11->(1,6)：1+2=3；

不能取3和6！！！