Russian Doll Envelopes DP | Dataford Interview Questions

Implement a solution to the Russian Doll Envelopes problem using an optimized dynamic programming and binary search approach.

Use the signature def maxEnvelopes(envelopes):. envelopes is a list of [width, height] pairs. Return the maximum number of envelopes that can be nested, where both width and height must strictly increase at every step. An envelope cannot be rotated.

Example: [[5, 4], [6, 4], [6, 7], [2, 3]] returns 3, using [2, 3], [5, 4], and [6, 7].

Constraints

1 <= len(envelopes) <= 1000
1 <= envelopes[i][0], envelopes[i][1] <= 10^9
Each envelope is represented by exactly two integers, width and height
Envelopes cannot be rotated
Both width and height must strictly increase when nesting

Function Signature

def maxEnvelopes(envelopes):

Your question is Russian Doll Envelopes DP. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Implement a solution to the Russian Doll Envelopes problem using an optimized dynamic programming and binary search approach.

Example: [[5, 4], [6, 4], [6, 7], [2, 3]] returns 3, using [2, 3], [5, 4], and [6, 7].

Constraints

1 <= len(envelopes) <= 1000
1 <= envelopes[i][0], envelopes[i][1] <= 10^9
Each envelope is represented by exactly two integers, width and height
Envelopes cannot be rotated
Both width and height must strictly increase when nesting

Function Signature

def maxEnvelopes(envelopes):

Your question is Russian Doll Envelopes DP. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.