Minimum Path Sum (DP) 2015-07-09

题目： Given a  m  x  n  grid filled with non-negative numbers, find a path from top left to bottom right which  minimizes & ...

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Reorder List (Linked List) 2015-07-09

题目： Given a singly linked list  L :  L 0 → L 1 →…→ L n -1 → L n , reorder it to:  L 0 → L n → L 1 → L n -1 → L ...

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Subsets II （Array，Back Tracking，Bit Manipulation） 2015-07-08

题目： Given a collection of integers that might contain duplicates,  nums , return all possible subsets. Note: Elements in a subset mus ...

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SubSets (Array, Back Tracking, Bit Manipulation) 2015-07-08

题目： Given a set of distinct integers,  nums , return all possible subsets. Note: Elements in a subset must be in non-descending order. ...

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Repeated DNA Sequences 2015-07-07

题目： All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes us ...

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Single Number II (Array, Bit Manipulation) 2015-07-07

题目： Given an array of integers, every element appears  three  times except for one. Find that single one. Note: Your algorithm should ...

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