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Blackrock Problems
Master the most frequently asked interview questions for this company.
ID
Title
Difficulty
Topics
202
Happy Number
Easy
Hash Table
Math
20
Valid Parentheses
Easy
String
Stack
399
Evaluate Division
Medium
Array
String
3068
Find the Maximum Sum of Node Values
Hard
Array
Dynamic Programming
1010
Pairs of Songs With Total Durations Divisible by 60
Medium
Array
Hash Table
3004
Maximum Subtree of the Same Color
Medium
Array
Dynamic Programming
49
Group Anagrams
Medium
Array
Hash Table
121
Best Time to Buy and Sell Stock
Easy
Array
Dynamic Programming
1514
Path with Maximum Probability
Medium
Array
Graph
2291
Maximum Profit From Trading Stocks
Medium
Array
Dynamic Programming
200
Number of Islands
Medium
Array
Depth-First Search
242
Valid Anagram
Easy
Hash Table
String
322
Coin Change
Medium
Array
Dynamic Programming
22
Generate Parentheses
Medium
String
Dynamic Programming
2592
Maximize Greatness of an Array
Medium
Array
Two Pointers
545
Boundary of Binary Tree
Medium
Tree
Depth-First Search
5
Longest Palindromic Substring
Medium
Two Pointers
String
