Tower of Hanoi

Problem

Return the moves needed to transfer n discs from peg A to C using peg B.

Examples

Example 1

Input: 2

Output: ["A→B","A→C","B→C"]

Example 2

Input: 1

Output: ["A→C"]

Input and output use JSON-compatible values. For linked-list and tree questions, arrays represent the node structure as described above. Your code should implement solve(input).

Write your solutionImplement solve(input). Your draft is saved in this browser.

Compiler

How to solve Tower of Hanoi

Return the moves needed to transfer n discs from peg A to C using peg B. Move n−1 discs out of the way before moving the largest. The reference implementation illustrates this approach; check the example and edge cases.

Time and space complexity

O(2^n) time and output space.

Practise and improve

Choose JavaScript, TypeScript or Python, complete the starter code, then select Run Tests. Request a hint when you need guidance, or choose View solution and confirm if you would like to study the reference implementation.