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Array (176)Sorting (46)Depth First Search (44)Tree (41)Breadth First Search (35)Stack (29)Linked List (28)Recursion (18)Graph Theory (12)Monotonic Stack (10)Queue (7)Shortest Path (2)

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Title	Difficulty	Videos	Companies
Smallest Palindromic Rearrangement II	hard	-
Smallest positive integer that cannot be represented as the sum of a subset of a sorted array	easy	-	amazon
Smallest set to cover all intervals	medium	-	google microsoft
Smallest sparse number greater than or equal to N	hard	-	oracle
Smallest String With Swaps	medium	-
Smallest Substring With Identical Characters I	hard	-
Smallest Substring With Identical Characters II	hard	-
Solve Magnet Puzzle	hard	-
Sort a linked list in O(n log n) time and constant space	medium	-	google
Sort a list using reverse sublist operation	hard	-
Sort a nearly sorted K sorted array	medium	-	palantir
Sort Array - Odds Ascending and Before Evens Descending	easy	-
Sort Binary Array	easy	-
Sort Names by their Last Names	easy	-
Sort Strings by Anagram Key	medium	-
Sort Three Numbers Without Conditionals	easy	-
Sorting a 2GB file with one string per line	medium	-
Sorting a Stack using push,pop,isEmpty and peek	medium	-
Soundex Algorithm Implementation	hard	-	grammarly
Split Linked List at the middle	medium	-
Split Linked List in alternating way	medium	-
Split Linked List into two halves fractionally given n	medium	-
Split string into fewest palindromic substrings	hard	-	google
Split Two Strings to Make Palindrome	medium	-
Splitting a String Into Descending Consecutive Values	medium	-
Square root of a real number	medium	-
Stable Marriage Problem	hard	-	amazon
Stack of plates	medium	-	microsoft amazon
Step Word Anagram Generator	medium	-	pivotal
Stock Price Fluctuation	medium	-	two-sigma
Stock Span	medium	-
Stone Pyramid Construction	hard	-	uber
Strassen Matrix Multiplication Algorithm	medium	-
Strong Password Checker and Suggester	medium	-
Subarray sum equals K - Return any subarray	medium	-	lyft
Subarray with sum divisible by k	medium	-
Subarrays vs Subsequences vs Subsets Definition	easy
Subsequences with a Unique Middle Mode I	hard	-
Subsequences with a Unique Middle Mode II	hard	-
Subset Sum 1 - Is there a subset?	medium	-
Subset Sum 2 - Count the subsets	medium	-
Substring Matching Pattern	easy	-
Subtract Two Numbers Without Using Arithematic Operators	easy	-
Subtract using plus operator only	easy	-
Subtractive Euclidean Algorithm to find GCD of two numbers	medium	-
Subtree Inversion Sum	hard	-
Sum of all subarrays	medium	-
Sum of Good Numbers	easy	-
Sum of k smallest elements in BST	medium	-
Sum of K Subarrays With Length at Least M	medium	-

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