Problem - H - Codeforces

PCCA Winter Camp Contest 2023
Finished

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Contest website

→ Virtual participation

Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ICPC mode for virtual contests. If you've seen these problems, a virtual contest is not for you - solve these problems in the archive. If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive. Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.

→ Practice?

Want to solve the contest problems after the official contest ends? Just register for practice and you will be able to submit solutions.

Examples

Input

4
   /\
   --
  /..\
  ----
 /\/./\
 --..--
/\/..\.\
--------

Output

Input

4
   /\
   ..
  /..\
  ....
 /....\
 ......
/......\
--------

Output

Input

6
     /\
     ..
    /./\
    ..--
   /....\
   --....
  /./.../\
  ----..--
 /\/\..../\
 --....--..
/..././\../\
------------

Output

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