University of Ulm Local Contest

Source file: average.(c|C|hs|java|pas)

Input file: average.in

A relay is a race for two or more teams of runners. Each member
of a team runs one section of the race. Your task is to help to
evaluate the results of a relay race.

You have to process several teams. For each team you are given a
list with the running times for every section of the race. You are
to compute the average time per kilometer over the whole distance.
That's easy, isn't it?

So if you like the fun and challenge competing at this contest, perhaps you like a relay race, too. Students from Ulm participated e.g. at the "SOLA" relay in Zurich, Switzerland. For more information visit http://www.sola.asvz.ethz.ch/ after the contest is over.

**Input Specification**

The first line of the input specifies the number of sections *n*
followed by the total distance of the relay *d* in kilometers.
You may safely assume that *1<=n<=20* and *0.0<d<200.0*.
Every following line gives information about one team: the team number
*t* (an integer, right-justified in a field of width 3) is followed
by the *n* results for each section, separated by a single space.
These running times are given in the format `"h:mm:ss"`
with integer numbers for the hours, minutes and seconds, respectively.
In the special case of a runner being disqualified, the running time
will be denoted by `"-:--:--"`. Finally, the data on
every line is terminated by a *newline* character. Input is terminated
by EOF.

**Output Specification**

For each team output exactly one line giving the team's number *t*
right aligned in a field of width 3, and the average time for this
team rounded to whole seconds in the format `"m:ss"`.
If at least one of the team's runners has been disqualified, output
`"-"` instead. Adhere to the sample output for the
exact format of presentation.

**Sample Input**

2 12.5 5 0:23:21 0:25:01 42 0:23:32 -:--:-- 7 0:33:20 0:41:35

**Sample Output**

5: 3:52 min/km 42: - 7: 6:00 min/km