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22 questions
Interview frequency breakdown: 30-day, 3-month, 6-month & all-time
5 Easy
14 Med
3 Hard
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22
questions
#20
Valid Parentheses
Easy
string
NeetCode
100% Freq
3m
#121
Best Time to Buy and Sell Stock
Easy
array
NeetCode
100% Freq
6m
#200
Number of Islands
Medium
array
NeetCode
100% Freq
#2064
Minimized Maximum of Products Distributed to Any Store
Medium
array
WalkCCC
100% Freq
#3187
Peaks in Array
Hard
array
WalkCCC
100% Freq
#56
Merge Intervals
Medium
array
NeetCode
90% Freq
#218
The Skyline Problem
Hard
array
WalkCCC
82% Freq
#21
Merge Two Sorted Lists
Easy
linked list
NeetCode
72% Freq
#26
Remove Duplicates from Sorted Array
Easy
array
NeetCode
72% Freq
#49
Group Anagrams
Medium
array
NeetCode
72% Freq
#133
Clone Graph
Medium
hash table
NeetCode
72% Freq
#146
LRU Cache
Medium
hash table
NeetCode
72% Freq
#152
Maximum Product Subarray
Medium
array
NeetCode
72% Freq
#189
Rotate Array
Medium
array
NeetCode
72% Freq
#260
Single Number III
Medium
array
WalkCCC
72% Freq
#347
Top K Frequent Elements
Medium
array
NeetCode
72% Freq
#420
Strong Password Checker
Hard
string
WalkCCC
72% Freq
#921
Minimum Add to Make Parentheses Valid
Medium
string
WalkCCC
72% Freq
#1344
Angle Between Hands of a Clock
Medium
math
WalkCCC
72% Freq
#6
Zigzag Conversion
Medium
string
WalkCCC
65% Freq
#162
Find Peak Element
Medium
array
NeetCode
65% Freq
#344
Reverse String
Easy
two pointers
NeetCode
65% Freq