← CSES Better

Wormhole Sort

USACO · 2020 · January · silver-3

Open official problem ↗
Ask AI

Open a hint-first prompt in a new AI chat. Grok may ask you to confirm before sending.

Open Claude Desktop

binary-search · trees · sorting

The organizer’s problem statement is available at the official source link.

sample trace

Wormhole Sort: binary search walkthrough

Wormhole Sort: use the linked editorial?s binary search, trees idea on the published sample, then verify the displayed output.

Published input4 4 3 2 1 4 1 2 9 1 3 7 2 3 10 2 4 3 4 1 1 2 3 4 4 2 13modelAlgorithm ideaSearch a monotone boundary by repeatedly testing a midpoint with the editorial?s feasibility condition.task resultExpected output9 -1
  1. 1

    Range

    Set the candidate interval for the quantity the task asks to minimize or maximize.
  2. 2

    Test

    Evaluate the task?s feasibility condition at the midpoint.
  3. 3

    Narrow

    Keep the half containing the true boundary until the answer is determined.
  4. 4

    Verify the sample

    Use the published sample output to check the result of this idea on the displayed input.
Tools
1
2
3
4
5
6
7
8
9
10
11
12
Draft saved locally
|12 lines, 156 chars

Run output

Run your code to see output.