以正确的格式输出时间的计算的问题，怎么采用C语言的程序代码的编写的方式实现的？

Problem Description
Given a time HH:MM:SS and one parameter a, you need to calculate next time satisfying following conditions:

1. The angle formed by the hour hand and the minute hand is a.
2. The time may not be a integer(e.g. 12:34:56.78), rounded down(the previous example 12:34:56).

Input
The input contains multiple test cases.

Each test case contains two lines.
The first line is the time HH:MM:SS(0≤HH<12,0≤MM<60,0≤SS<60).
The second line contains one integer a(0≤a≤180).

Output
For each test case, output a single line contains test case number and the answer HH:MM:SS.

Sample Input
0:59:59
30
01:00:00
30

Sample Output
Case #1: 01:00:00
Case #2: 01:10:54