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			Title
	Contains Duplicate #1 arrayhash tablesorting
	Valid Anagram #2 arraystringsorting
	Two Sum #3 arrayhash table
	Group Anagrams #4 arrayhash tablesortingstring
	Top K Frequent Elements #5 arrayhash tableHeapSorting
	Product of Array Except Self #6 arrayprefix sum
	Valid Sudoku #7 arrayhash tableMatrix
	Longest Consecutive Sequence #8 arrayhash tableUnion Find
	Can Place Flowers #150 arraygreedy
	Number of laser Beams #151 arrayMathstringmatrix
	Design Browser History #152 arrayDesign
	Valid Palindrome #9 two pointersstring
	Two Sum \|\| Input Array is Sorted #10 arraytwo pointers binary search
	3Sum #11 arraytwo pointerssorting
	Container with Most water #12 arraytwo pointersgreedy
	Trapping Rain Water #13 arraytwo pointers dpstack
	rearrange array elements by sign #166 arraytwo pointers
	find median from data stream #167 arraytwo pointersdesignheap
	Valid Parantheses #140 stringstack
	Min Stack #14 stackdesign
	Generate Parantheses #15 stringdaynamic programmingbacktracking
	Daily Temperatures #16 arraystackmonotonic stack
	Car Fleet #17 arraystacksortingmonotonic stack
	Largest Rectangle in Histogram #18 arraystackmonotonic stack
	Implement stack using queues #168 arraystackqueue
	Online stock span #169 arraystackmonotonic stack
	Binary Search #19 arraybinary search
	Capacity to ship packages within d days #161 arraybinary search
	Search Suggestion System #162 arraybinary searchstring
	Minimum days to make m bouquets #163 arraybinary search
	magnetic force between two balls #164 arraybinary searchsorting