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77 questions
Interview frequency breakdown: 30-day, 3-month, 6-month & all-time
18 Easy
45 Med
14 Hard
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77
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77
questions
#146
LRU Cache
Medium
hash table
NeetCode
100% Freq
3m
#2603
Collect Coins in a Tree
Hard
array
WalkCCC
100% Freq
#5
Longest Palindromic Substring
Medium
two pointers
NeetCode
91% Freq
#11
Container With Most Water
Medium
array
NeetCode
88% Freq
6m
#525
Contiguous Array
Medium
array
WalkCCC
88% Freq
6m
#1293
Shortest Path in a Grid with Obstacles Elimination
Hard
array
WalkCCC
88% Freq
6m
#198
House Robber
Medium
array
NeetCode
86% Freq
#212
Word Search II
Hard
array
NeetCode
84% Freq
#3508
Implement Router
Medium
array
WalkCCC
73% Freq
#3607
Power Grid Maintenance
Medium
array
WalkCCC
73% Freq
#3
Longest Substring Without Repeating Characters
Medium
hash table
NeetCode
72% Freq
#48
Rotate Image
Medium
array
NeetCode
71% Freq
#1380
Lucky Numbers in a Matrix
Easy
array
WalkCCC
71% Freq
#54
Spiral Matrix
Medium
array
NeetCode
69% Freq
#2081
Sum of k-Mirror Numbers
Hard
math
WalkCCC
68% Freq
#2448
Minimum Cost to Make Array Equal
Hard
array
WalkCCC
68% Freq
#1784
Check if Binary String Has at Most One Segment of Ones
Easy
string
WalkCCC
65% Freq
#2047
Number of Valid Words in a Sentence
Easy
string
WalkCCC
65% Freq
#2067
Number of Equal Count Substrings
Medium
hash table
WalkCCC
65% Freq
#3047
Find the Largest Area of Square Inside Two Rectangles
Medium
array
WalkCCC
65% Freq
#3648
Minimum Sensors to Cover Grid
Medium
math
WalkCCC
65% Freq
#412
Fizz Buzz
Easy
math
WalkCCC
64% Freq
#498
Diagonal Traverse
Medium
array
WalkCCC
64% Freq
#53
Maximum Subarray
Medium
array
NeetCode
63% Freq
#72
Edit Distance
Medium
string
NeetCode
60% Freq
#1443
Minimum Time to Collect All Apples in a Tree
Medium
hash table
WalkCCC
60% Freq
#20
Valid Parentheses
Easy
string
NeetCode
57% Freq
#1
Two Sum
Easy
array
NeetCode
56% Freq
#141
Linked List Cycle
Easy
hash table
NeetCode
56% Freq
#2
Add Two Numbers
Medium
linked list
NeetCode
52% Freq
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