Time Limit: Java: 2000 ms / Others: 2000 ms

Memory Limit: Java: 65536 KB / Others: 65536 KB

High on the wall of the church tower in a small village in Transylvania is
an analog clock. It has an hour hand and a minute hand and a conventional 12-hour
dial. The clock's mechanism advances both hands by the appropriate amount once
every minute.

During the night preceding April Fool's Day, two mischievous and mechanically
skilled persons embark on a clandestine expedition. They ascend the church tower
and interchange ("swap") the clock's two hands, so that each hand
is pointing in the direction in which the other hand should be pointing.

For example, suppose the true time is 7:18. Then we have the scenario depicted
in Figures 1a and 1b:

The observer who looks at the swapped clock at this time (assuming he/she has no preconceived notion of what time it ought to be) will say: "It is 3:37."

Just two minutes later, at 7:20, however, the scenario will
be very different, as shown in Figures 2a and 2b:

At this point, the observer who looks at the swapped clock will notice that the hour hand is pointing directly at the 4 o'clock position, so it ought to be very close to 4 o'clock. But the minute hand indicates that it is 37 minutes past the hour, which is not compatible with the hour hand's position. In this case, we say that the swapped clock's configuration is not valid.

Here is an example of the input for your program:

7 18

7 19

7 20

3 0

3 2

4 30

12 15

Each line of the input contains two integers (separated by one or more blank
spaces) that specify the hours and minutes of the current true time, respectively.
The value of hours will be in the range 1..12, the value of minutes will be
in the range 0..59.

For each line of input, your program will determine whether the swapped clock's
hands will form a valid configuration, and if so, print out the time shown by
the swapped clock.

More specifically, here is the output resulting from the input listed above:

Problem 3 by team x

==============================================================================

True True Minutes From
Minutes From Discrepancy Swapped Swapped

Hours Minutes Minute Hand In Hour Hand In
Of Minutes Hours Minutes

Swapped
Clock Swapped Clock

==============================================================================

7 18
37 36
1
3 37

7 19 37
48 11
3 37

7 20 37
0 23
-- --

3 0
15 0
15 -- --

3 2 15
24
9 12 15

4 30
23
0 23
-- --

12 15
1 0
1 3 1

==============================================================================

End of problem 3 by team x

The numbers in the first two vertical fields of the output just echo the input.

From the input values, it is straightforward to calculate the position of the
minute hand in the swapped clock, which determines a certain number of minutes
past the hour, as listed in the third field of the output.

From the input values, it is also straightforward to calculate the position
of the hour hand in the swapped clock. The position of the hour hand actually
determines hours as well as minutes; the minutes are listed in the fourth field
of the output.

The discrepancy between the two results for minutes, listed in the fifth field
of the output, is first calculated as the absolute value of the difference between
the two results for minutes. This discrepancy, however, cannot exceed 30 minutes,
so (as on the third line of numerical output) it may need to be subtracted from
60 minutes.

Results in the third and fourth output fields are rounded to the nearest integer,
if necessary. The discrepancy (in the fifth output field) is calculated from
the integer values displayed in the third and fourth output fields.

The configuration of the swapped clock is considered to be valid if the discrepancy
does not exceed 12 minutes.

In this case, the swapped clock's time is printed in the sixth and seventh fields
of the output. The value of minutes displayed in the seventh field is identical
to the value displayed in the third field.

Otherwise, two hyphens are displayed in each of the sixth and seventh output
fields.

Observe every detail of the output, such as the exact wording of the headers,
upper/lower case variations, separator lines (of equal signs) and blank spaces.

A few lines of the above output will be reproduced here with a formatting template:

1
2 3
4 5
6 7

123456789012345678901234567890123456789012345678901234567890123456789012345678

True True Minutes From
Minutes From Discrepancy Swapped Swapped

Hours Minutes Minute Hand In Hour Hand In Of
Minutes Hours Minutes

Swapped
Clock Swapped Clock

==============================================================================

7 18
37 36
1 3 37

提交代码