Word Pattern

Problem

Check whether a space-separated sentence follows a character pattern.

Examples

Example 1

Input: {"pattern":"abba","sentence":"dog cat cat dog"}

Output: true

Example 2

Input: {"pattern":"abba","sentence":"dog cat cat fish"}

Output: false

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 Word Pattern

Check whether a space-separated sentence follows a character pattern. The relationship between pattern symbols and words must be one-to-one. The reference implementation illustrates this approach; check the example and edge cases.

Time and space complexity

O(n) expected time and O(n) 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.