help me to find a approach for this kind of problems?

Правка en2, от STARCP, 2021-09-10 19:16:20

recently when i'am practicing i encounter two problems that have something common in them i could not understand editorial and others solutions too can someone help to find a approach for this kind of problems below are the links to two problems.

1237B - Balanced Tunnel ** the editorial to this problem written by tourist**

Spoiler
Теги #help me

История

 
 
 
 
Правки
 
 
  Rev. Язык Кто Когда Δ Комментарий
en4 Английский STARCP 2021-09-10 19:38:22 9 Tiny change: 'oblems.**_\n\n[probl' -> 'oblems.**_==================\n\n[probl' (published)
en3 Английский STARCP 2021-09-10 19:34:59 1530 Tiny change: 'm:1237B]\n** the e' -> 'm:1237B]\n<br>\n** the e'
en2 Английский STARCP 2021-09-10 19:16:20 682
en1 Английский STARCP 2021-09-10 19:09:45 1107 Initial revision (saved to drafts)