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help me to find a approach for this kind of problems?
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**
| Rev. | Lang. | By | When | Δ | Comment | |
|---|---|---|---|---|---|---|
| en4 |
|
STARCP | 2021-09-10 19:38:22 | 9 | Tiny change: 'oblems.**_\n\n[probl' -> 'oblems.**_==================\n\n[probl' (published) | |
| en3 |
|
STARCP | 2021-09-10 19:34:59 | 1530 | Tiny change: 'm:1237B]\n** the e' -> 'm:1237B]\n<br>\n** the e' | |
| en2 |
|
STARCP | 2021-09-10 19:16:20 | 682 | ||
| en1 |
|
STARCP | 2021-09-10 19:09:45 | 1107 | Initial revision (saved to drafts) |
