Shayan's blog

Codeforces Round 962 (Div. 3) — Video Tutorial
By Shayan, history, 2 years ago, In English

1996A — Legs

1996B — Scale

1996C — Sort

1996D — Fun

1995E — Decode

1995F — Bomb

1996G — Penacony — My Segtree solution

1996G — Penacony — Jiangly's XOR hashing beautiful solution

  • Vote: I like it
  • +7
  • Vote: I do not like it

Comments Comments (4)
| Write comment?
»
2 years ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

why we ignored ac and bc in ab+ac+bc<=n ??

→ Reply
  • »
    »
    2 years ago, hide # ^ |
    ← Rev. 2  
    Vote: I like it 0 Vote: I do not like it

    We do not ignore those terms. We just know that it is necessary for ab to be <= n (not sufficient. Therefore, our second loop for b goes to n / a, not n.

    → Reply
»
2 years ago, hide # |
← Rev. 2  
Vote: I like it 0 Vote: I do not like it

Great Explanations!

→ Reply
»
2 years ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

The E question is almost exactly the same as the "skill upgrade" of the 13th Provincial Competition of the 2022 Blue Bridge Cup, and I have done this question before and memorized the answers in the solution, but I said that I checked the duplicate with other codes, but I don't know those people at all

→ Reply