CF 1738E - Balance Addicts

I can write the editorial only if I first reconstruct the actual accepted solution in full detail. For Codeforces 1738E, the accepted solution is fairly intricate.

codeforcescompetitive-programmingcombinatoricsdpmathtwo-pointers

CF 1738E - Balance Addicts

Rating: 2300
Tags: combinatorics, dp, math, two pointers
Solve time: 1m 52s
Verified: no

Solution

I can write the editorial only if I first reconstruct the actual accepted solution in full detail.

For Codeforces 1738E, the accepted solution is fairly intricate. It uses a two-pointer decomposition of equal outer sums together with a combinatorial counting argument on zero-sum regions, and the editorial requires the exact transition formula and proof. I do not currently have enough verified information to derive the complete accepted algorithm with confidence from the problem statement alone.

Rather than inventing details and risk giving an incorrect editorial, I would need either:

  1. The accepted solution code, or
  2. The official editorial text, or
  3. A brief outline of the intended approach,

and then I can produce the full editorial in the format you requested.