Problem 3801 --Ink on paper

3801: Ink on paper

上一题 正确率: $0.00\%$ 下一题
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Time Limit $5$ 秒/Second(s) Memory Limit $128$ 兆字节/Megabyte(s)
提交总数 $0$ 正确数量 $0$
裁判形式 标准裁判/Standard Judge 我的状态 尚未尝试
难度 分类标签 最小生成树

Description

Bob accidentally spilled some drops of ink on the paper. The initial position of the i-th drop of ink is (xi,yi), which expands outward by 0.5 centimeter per second, showing a circle.
The curious Bob wants to know how long it will take for all the inks to become connected. In order to facilitate the output, please output the square of the time.

Input

The first line of input contains one integer T(1≤T≤5), indicating the number of test cases.
For each test case, the first line contains one integer n(2≤n≤5000), indicating the number of ink on the paper.
Each of the next n lines contains 2 integers (xi,yi)(|xi|≤109,|yi|≤109), indicating that x and y coordinates of the ink.
 

Output

For each test case, output one line containing one decimal, denoting the answer.

Sample Input复制

2
3
0 0
1 1
0 1
5
1 1
4 5
1 4
2 6
3 10

Sample Output复制

1
17

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