本文解析了2016年ACM/ICPC亚洲区沈阳站比赛的一道题目，涉及几何计算问题，具体为当倾斜圆柱杯时液体表面面积的计算。给出输入输出样例及限制条件。
2016沈阳区域赛http://acm.hdu.edu.cn/showproblem.php?pid=5954
Do not pour out
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)
Total Submission(s): 1660 Accepted Submission(s): 326
Problem Description
You have got a cylindrical cup. Its bottom diameter is 2 units and its height is 2 units as well.
The height of liquid level in the cup is d (0 ≤ d ≤ 2). When you incline the cup to the maximal angle such that the liquid inside has not been poured out, what is the area of the surface of the liquid?
The height of liquid level in the cup is d (0 ≤ d ≤ 2). When you incline the cup to the maximal angle such that the liquid inside has not been poured out, what is the area of the surface of the liquid?
Input
The first line is the number of test cases. For each test case, a line contains a float-point number d.
Output
For each test case, output a line containing the area of the surface rounded to 5 decimal places.
Sample Input
4 0 1 2 0.424413182
Sample Output
0.00000 4.44288 3.14159 3.51241
Source
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