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150 questions
Interview frequency breakdown: 30-day, 3-month, 6-month & all-time
33 Easy
92 Med
25 Hard
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150
questions
#3
Longest Substring Without Repeating Characters
Medium
hash table
NeetCode
100% Freq
3m
#68
Text Justification
Hard
array
WalkCCC
100% Freq
#526
Beautiful Arrangement
Medium
array
WalkCCC
100% Freq
6m
#636
Exclusive Time of Functions
Medium
array
WalkCCC
100% Freq
6m
#3919
Minimum Cost to Move Between Indices
Medium
array
WalkCCC
100% Freq
30d
#3459
Length of Longest V-Shaped Diagonal Segment
Hard
array
WalkCCC
99% Freq
#1861
Rotating the Box
Medium
array
WalkCCC
96% Freq
#1
Two Sum
Easy
array
NeetCode
95% Freq
#2484
Count Palindromic Subsequences
Hard
string
WalkCCC
94% Freq
6m
#3071
Minimum Operations to Write the Letter Y on a Grid
Medium
array
WalkCCC
93% Freq
#924
Minimize Malware Spread
Hard
array
WalkCCC
92% Freq
3m
#928
Minimize Malware Spread II
Hard
array
WalkCCC
92% Freq
3m
#15
3Sum
Medium
array
NeetCode
92% Freq
#146
LRU Cache
Medium
hash table
NeetCode
89% Freq
6m
#3043
Find the Length of the Longest Common Prefix
Medium
array
WalkCCC
89% Freq
#3046
Split the Array
Easy
array
WalkCCC
86% Freq
#121
Best Time to Buy and Sell Stock
Easy
array
NeetCode
85% Freq
#32
Longest Valid Parentheses
Hard
string
WalkCCC
85% Freq
6m
#56
Merge Intervals
Medium
array
NeetCode
85% Freq
3m
#1963
Minimum Number of Swaps to Make the String Balanced
Medium
two pointers
WalkCCC
85% Freq
6m
#2680
Maximum OR
Medium
array
WalkCCC
85% Freq
6m
#2964
Number of Divisible Triplet Sums
Medium
array
WalkCCC
85% Freq
6m
#2768
Number of Black Blocks
Medium
array
WalkCCC
81% Freq
#3161
Block Placement Queries
Hard
array
WalkCCC
81% Freq
#210
Course Schedule II
Medium
depth first search
NeetCode
81% Freq
3m
#329
Longest Increasing Path in a Matrix
Hard
array
NeetCode
81% Freq
3m
#2672
Number of Adjacent Elements With the Same Color
Medium
array
WalkCCC
79% Freq
#49
Group Anagrams
Medium
array
NeetCode
78% Freq
6m
#1389
Create Target Array in the Given Order
Easy
array
WalkCCC
78% Freq
#42
Trapping Rain Water
Hard
array
NeetCode
77% Freq
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