Czech ACM Student Chapter
Czech Technical University in Prague
Charles University in Prague
Technical University of Ostrava
Slovak University of Technology
Masaryk University
CTU Open Contest 2007
Calendar of Events
calendar.c, calendar.C, calendar.p,
Marketing people are very creative and must regularly attend many creative meetings. In the
past, the meetings used to repeat every week. Now, there are so many of them, that the period
must have been changed to one month.
The monthly schedule of ACM now contains one meeting for each of the first N days in every
month (including weekends). Meetings are identified by non-negative integer numbers. Recently,
ACM found out that the schedule must be reorganized and the order of meetings changed. The
new order has already been chosen. The only problem is that the meeting-planning department
has very limited privileges and must follow many directives that are in e.ect.
It fact, the only change that the department is allowed to do, is to issue a request to reverse the
order of meetings in the first D days of the month (D may be selected arbitrarily). For example,
if the current schedule is "1 2 3 4 5" and the department issues a request to reverse the first 3
days, the new schedule will be "3 2 1 4 5".
Another limitation is that the department is allowed to issue only one request per week. Since
they need the whole reorganization to finish in one year, the number of requests may not exceed
52. As you can see, their situation is not easy. Will you help.
Input Specification
The input contains a sequence of several reorganizations, the last one followed by a line with
Each reorganization consists of three lines: the first line contains a positive integer N -the
number of days in month that are considered, 1 . N . 30. The second line describes the
old schedule and the third line the new schedule, each of them contains N meeting identifiers,
separated with spaces. Some meetings may appear more than once.
Output Specification
For each reorganization, output a single line containing at most 52 positive integer numbers D
, ..., D
separated by a space (1 . D
. N). The numbers must form a valid sequence of
requests that will be issued to transform the old schedule to the new one.
You are guaranteed that such a sequence will exist. If there are more valid sequences, feel free
to output any of them.
Sample Input
Output for Sample Input