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Pull requests list

79. Word Search array An array is stored such that the position of each element can be computed from its index Backtracking incrementally builds candidates to the solutions, and abandons a candidate(invalid solution.) Medium Coefficient of difficulty medium
#40 by zwfang was merged Jan 4, 2019 Loading…
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77. Combinations Backtracking incrementally builds candidates to the solutions, and abandons a candidate(invalid solution.) Medium Coefficient of difficulty medium
#39 by zwfang was merged Jan 4, 2019 Loading…
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66. Plus One array An array is stored such that the position of each element can be computed from its index Easy Coefficient of difficulty easy math math includes the study of such topics as quantity, structure, space, and change.
#38 by zwfang was merged Jan 2, 2019 Loading…
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58. Length of Last Word Easy Coefficient of difficulty easy string A string is used to represent text. It is comprised of a set of characters.
#37 by zwfang was merged Jan 2, 2019 Loading…
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53. Maximum Subarray array An array is stored such that the position of each element can be computed from its index dynamic programming optimal substructure and overlapping sub-problem are two key attributes for dynamic programming. Easy Coefficient of difficulty easy
#36 by zwfang was merged Jan 2, 2019 Loading…
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48. Rotate Image array An array is stored such that the position of each element can be computed from its index Medium Coefficient of difficulty medium
#35 by zwfang was merged Jan 2, 2019 Loading…
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35. Search Insert Position array An array is stored such that the position of each element can be computed from its index binary search a search algorithm that finds the position of target value within a sorted array. Easy Coefficient of difficulty easy
#34 by zwfang was merged Jan 2, 2019 Loading…
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28. Implement strStr() double index(two pointers) The Two Pointer Algorithm Easy Coefficient of difficulty easy string A string is used to represent text. It is comprised of a set of characters.
#33 by zwfang was merged Jan 2, 2019 Loading…
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24. Swap Nodes in Pairs Linked List A Linked list is a linear data structure where each element is a separate object. Medium Coefficient of difficulty medium
#32 by zwfang was merged Jan 2, 2019 Loading…
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23. Merge k Sorted Lists array An array is stored such that the position of each element can be computed from its index Hard Coefficient of difficulty is hard heap(priority queue) a heap is a specialized tree-based data structure which is essentially an almost complete tree Linked List A Linked list is a linear data structure where each element is a separate object.
#31 by zwfang was merged Jan 2, 2019 Loading…
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19. Remove Nth Node From End of List double index(two pointers) The Two Pointer Algorithm Linked List A Linked list is a linear data structure where each element is a separate object. Medium Coefficient of difficulty medium
#30 by zwfang was merged Jan 1, 2019 Loading…
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14. Longest Common Prefix Easy Coefficient of difficulty easy string A string is used to represent text. It is comprised of a set of characters.
#29 by zwfang was merged Dec 31, 2018 Loading…
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13. Roman to Integer Easy Coefficient of difficulty easy math math includes the study of such topics as quantity, structure, space, and change. string A string is used to represent text. It is comprised of a set of characters.
#28 by zwfang was merged Dec 31, 2018 Loading…
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9. Palindrome Number Easy Coefficient of difficulty easy math math includes the study of such topics as quantity, structure, space, and change.
#27 by zwfang was merged Dec 30, 2018 Loading…
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7. Reverse Integer Easy Coefficient of difficulty easy math math includes the study of such topics as quantity, structure, space, and change.
#26 by zwfang was merged Dec 30, 2018 Loading…
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674. Longest Continuous Increasing Subsequence array An array is stored such that the position of each element can be computed from its index Easy Coefficient of difficulty easy
#25 by zwfang was merged Dec 30, 2018 Loading…
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4. Median of Two Sorted Arrays array An array is stored such that the position of each element can be computed from its index binary search a search algorithm that finds the position of target value within a sorted array. Divide and Conquer recursively breaking down a problem into two or more sub-problem of the same or related type. Hard Coefficient of difficulty is hard Recursion solution depends on solutions to smaller instances of the same problem.
#24 by zwfang was merged Dec 30, 2018 Loading…
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717. 1-bit and 2-bit Characters array An array is stored such that the position of each element can be computed from its index Easy Coefficient of difficulty easy
#23 by zwfang was merged Dec 29, 2018 Loading…
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122. Best Time to Buy and Sell Stock II array An array is stored such that the position of each element can be computed from its index Easy Coefficient of difficulty easy Greedy algorithm making the locally optimal choice at each stage with the intent of finding the global optimum.
#22 by zwfang was merged Dec 29, 2018 Loading…
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121. Best Time to Buy and Sell Stock array An array is stored such that the position of each element can be computed from its index dynamic programming optimal substructure and overlapping sub-problem are two key attributes for dynamic programming. Easy Coefficient of difficulty easy
#21 by zwfang was merged Dec 28, 2018 Loading…
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303. Range Sum Query - Immutable array An array is stored such that the position of each element can be computed from its index Easy Coefficient of difficulty easy
#20 by zwfang was merged Dec 28, 2018 Loading…
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713 subarray product less than k solved. array An array is stored such that the position of each element can be computed from its index Medium Coefficient of difficulty medium sliding window A sliding window is a sub-list that runs over an underlying collection.
#19 by zwfang was merged Dec 28, 2018 Loading…
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11 container with most water solved. array An array is stored such that the position of each element can be computed from its index double index(two pointers) The Two Pointer Algorithm
#18 by zwfang was merged Dec 26, 2018 Loading…
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345 reverse vowels resolved. double index(two pointers) The Two Pointer Algorithm string A string is used to represent text. It is comprised of a set of characters.
#17 by zwfang was merged Dec 26, 2018 Loading…
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344 reverse string resolved. double index(two pointers) The Two Pointer Algorithm string A string is used to represent text. It is comprised of a set of characters.
#16 by zwfang was merged Dec 26, 2018 Loading…
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