Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns in JavaScript

Solution: Russian Doll Envelopes

Discover how to determine the maximum number of envelopes that can be nested inside one another using a strategy that combines sorting by width and height with a binary search approach to find the longest increasing subsequence. This lesson helps you implement and understand the solution with efficient time and space complexity, improving your problem-solving skills in coding interviews.

We'll cover the following...

Statement

You are given a 2D array of integers, envelopes, where each element envelopes[i] = [wi, hi] represents the width and height of an envelope. An envelope can fit inside another if and only if its width and height are strictly smaller than the width and height of the other envelope. The task is to determine the maximum number of envelopes that can be nested inside each other, similar to Russian dollsRussian dolls, also known as stacking dolls or nesting dolls, are a set of wooden dolls of decreasing size placed one inside another. .

Constraints:

  • 1≤1\leq envelopes.length ≤103\leq 10^3 ...