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109
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106
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93
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78
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49
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39
Stack
37
Design
33
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Bit Manipulation
31
Array
133
Dynamic Programming
109
String
106
Math
93
Hash Table
83
Tree
79
Depth-first Search
78
Binary Search
49
Two Pointers
45
Backtracking
39
Breadth-first Search
39
Stack
37
Design
33
Greedy
33
Bit Manipulation
31
Linked List
29
Heap
26
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19
Sort
19
Union Find
15
Divide and Conquer
14
Trie
14
Binary Search Tree
13
Recursion
10
Segment Tree
9
Binary Indexed Tree
5
Queue
5
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5
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4
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3
Map
2
Reservoir Sampling
2
Geometry
1
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21
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Google
275
Facebook
122
Microsoft
97
Amazon
93
Bloomberg
71
Uber
57
LinkedIn
52
Twitter
35
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30
Apple
30
Snapchat
27
Yelp
21
Zenefits
21
Pocket Gems
15
Yahoo
15
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14
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9
Dropbox
9
Palantir
8
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7
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7
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5
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4
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4
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4
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3
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3
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3
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3
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3
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3
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3
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2
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2
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2
Indeed
2
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2
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2
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2
Quip
2
Quora
2
Tencent
2
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1
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1
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1
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1
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1
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1
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1
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1
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