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Problems with tag O(n)

1949 found, showing 750 to 780

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26

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Implement Trie (Prefix Tree) ->

Medium, #208, 4 solutions

Implement Trie ->

Medium, #442, 1 solutions

Increasing Decreasing String ->

Easy, #1370, 2 solutions

Increasing Order Search Tree ->

Easy, #897, 2 solutions

Implement Queue by Two Stacks ->

Medium, #40, 1 solutions

Increasing Triplet Subsequence ->

Medium, #334, 4 solutions

Increasing Subsequences ->

Medium, #491, 2 solutions

Insert Delete GetRandom O(1) - Duplicates allowed ->

Hard, #381, 4 solutions

Insert Greatest Common Divisors in Linked List ->

Medium, #2807, 2 solutions

Insert Interval ->

Medium, #57, 5 solutions

Implement Stack using Queues ->

Easy, #225, 4 solutions

Insufficient Nodes in Root to Leaf Paths ->

Medium, #1080, 2 solutions

Integer Replacement ->

Medium, #397, 3 solutions

Implement Queue using Stacks ->

Easy, #232, 5 solutions

Insert Delete GetRandom O(1) ->

Hard, #380, 4 solutions

Intersection of Three Sorted Arrays ->

Easy, #1213, 2 solutions

Insert into a Sorted Circular Linked List ->

Medium, #708, 2 solutions

Interleaving Positive and Negative Numbers ->

Medium, #144, 1 solutions

Intervals Between Identical Elements ->

Medium, #2121, 2 solutions

Invalid Transactions ->

Medium, #1169, 2 solutions

Invalid Tweets ->

Easy, #1683, 1 solutions

Inversion of Object ->

Easy, #2822, 1 solutions

Invert Binary Tree ->

Easy, #226, 4 solutions

Investments in 2016 ->

Medium, #585, 1 solutions

IP to CIDR ->

Medium, #751, 2 solutions

IPO ->

Hard, #502, 3 solutions

Integer to Roman ->

Medium, #12, 4 solutions

Interval Sum II ->

Hard, #207, 1 solutions

Interval Sum ->

Hard, #206, 1 solutions

is Array a Preorder of Some ‌Binary Tree ->

Medium, #2764, 2 solutions