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31. Next Permutation
Description Implement next permutation, which rearranges numbers into the lexicographic...
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28. Implement strStr()
Description Implement strStr(). Return the index of the first occurrence of needle in h...
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27. Remove Element
Description Given an array and a value, remove all instances of that value in-place and...
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26. Remove Duplicates from Sorted Array
Description Given a sorted array, remove the duplicates in-place such that each element...
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25. Reverse Nodes in k-Group
Description Given a linked list, reverse the nodes of a linked list k at a time and ret...
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24. Swap Nodes in Pairs
Description Given a linked list, swap every two adjacent nodes and return its head. You...
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23. Merge k Sorted Lists
Description Merge k sorted linked lists and return it as one sorted list. Analyze and d...
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22. Generate Parentheses
Description Given n pairs of parentheses, write a function to generate all combinations...
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21. Merge Two Sorted Lists
Description Merge two sorted linked lists and return it as a new list. The new list sho...
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20. Valid Parentheses
Description Given a string containing just the characters '(', ')', '{', '}', '[' and '...
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19. Remove Nth Node From End of List
Description Given a linked list, remove the nth node from the end of list and return it...
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17. Letter Combinations of a Phone Number
Description Given a digit string, return all possible letter combinations that the numb...
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16. 3Sum Closest
Description Given an array S of n integers, find three integers in S such that the sum ...
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14. Longest Common Prefix
Description Write a function to find the longest common prefix string amongst an array ...
