Description
You are downloading some things using a software (Flashget, maybe), but suddenly you have to go away for something. So, you need a program to calculate when the tasks will complete.
Now you know every download's speed, size and max speed. When a task is over, the bandwidth used is distributed by other tasks. The speed of one task can never go beyond the max speed of this task, and all tasks' speed can never be larger than the total bandwidth.
Input
There are multiple cases in the input.
The first line of each case contains two integers, n and t (n<=100). n is the number of tasks, and t is the total bandwidth. There follows n lines, one line has three integers, means the size of the download file, the initial speed and the max speed. The input promises the sum of tasks' speed equals to the total bandwidth, the speed is not higher than the max speed.
The input is terminated by a zero.
Output
For each case first print "Case %:" in one line, % is the number of cases.
Then print n lines for n tasks, like this:
NO*:#s
3 65
100 20 30
200 30 30
300 15 30
0
Sample Output
Case 1:
NO1:5.000s
NO2:6.667s
NO3:12.500s
http://blog.csdn.net/stefansalvatore/article/details/55806906