#1681Hard· asked at 5 companies
Russian Doll Envelopes
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What we know
Example 1
Input: envelopes = [[5,4],[6,4],[6,7],[2,3]] Output: 3
[2,3] => [5,4] => [6,7].
Example 2
Input: envelopes = [[1,1],[1,1],[1,1]] Output: 1
Constraints
- •
1 <= envelopes.length <= 10^5 - •
envelopes[i].length == 2 - •
1 <= w_i, h_i <= 10^5