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Problems with tag O(n)

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Cosine Similarity ->

Easy, #445, 2 solutions

Count All Valid Pickup and Delivery Options ->

Hard, #1359, 2 solutions

Count Alternating Subarrays ->

Medium, #3101, 2 solutions

Count Anagrams ->

Hard, #2514, 2 solutions

Count Apples and Oranges ->

Medium, #1715, 1 solutions

Count Artist Occurrences On Spotify Ranking List ->

Easy, #2669, 1 solutions

Count Asterisks ->

Easy, #2315, 2 solutions

Count Beautiful Substrings I ->

Medium, #2947, 2 solutions

Count Beautiful Substrings II ->

Hard, #2949, 2 solutions

Count Binary Substrings ->

Easy, #696, 2 solutions

Count Collisions on a Road ->

Medium, #2211, 2 solutions

Count Complete Subarrays in an Array ->

Medium, #2799, 2 solutions

Count Different Palindromic Subsequences ->

Hard, #730, 3 solutions

Count Elements With Maximum Frequency ->

Easy, #3005, 2 solutions

Count Elements With Strictly Smaller and Greater Elements ->

Easy, #2148, 2 solutions

Count Fertile Pyramids in a Land ->

Hard, #2088, 2 solutions

Count Good Meals ->

Medium, #1711, 3 solutions

Count Good Nodes in Binary Tree ->

Medium, #1448, 2 solutions

Count Good Triplets in an Array ->

Hard, #2179, 2 solutions

Count Hills and Valleys in an Array ->

Easy, #2210, 2 solutions

Count Increasing Quadruplets ->

Hard, #2552, 2 solutions

Count Integers in Intervals ->

Hard, #2276, 2 solutions

Count Items Matching a Rule ->

Easy, #1773, 3 solutions

Count K-Subsequences of a String With Maximum Beauty ->

Hard, #2842, 2 solutions

Count Largest Group ->

Easy, #1399, 2 solutions

Count Nice Pairs in an Array ->

Medium, #1814, 3 solutions

Count Nodes Equal to Average of Subtree ->

Medium, #2265, 2 solutions

Count Nodes Equal to Sum of Descendants ->

Medium, #1973, 2 solutions

Count Nodes With the Highest Score ->

Medium, #2049, 2 solutions

Count Number of Bad Pairs ->

Medium, #2364, 2 solutions