BlackRock

14 LeetCode interview questions

Difficulty Distribution

Easy

6

43%

Medium

7

50%

Hard

1

7%

Top Topics

Array(6)Hash Table(5)String(4)Dynamic Programming(4)Math(4)Sorting(3)Two Pointers(2)Bit Manipulation(2)Stack(1)Greedy(1)

All Questions

Title	Difficulty	Acceptance	Frequency	Topics
Happy Number	Easy	59.2%	100.0%	Hash TableMathTwo Pointers
Group Anagrams	Medium	72.2%	62.5%	ArrayHash TableString+1
Best Time to Buy and Sell Stock	Easy	56.4%	62.5%	ArrayDynamic Programming
Maximum Subtree of the Same Color	Medium	58.3%	62.5%
Find the Maximum Sum of Node Values	Hard	69.5%	62.5%	ArrayDynamic ProgrammingGreedy+3
Valid Parentheses	Easy	43.7%	50.0%	StringStack
Maximum Profit From Trading Stocks	Medium	48.0%	50.0%
Boundary of Binary Tree	Medium	47.9%	37.5%
Number of Islands	Medium	63.8%	37.5%	ArrayDepth-First SearchBreadth-First Search+2
Longest Palindromic Substring	Medium	37.3%	37.5%	Two PointersStringDynamic Programming
Two Sum	Easy	57.1%	37.5%	ArrayHash Table
Missing Number	Easy	71.6%	37.5%	ArrayHash TableMath+3
Climbing Stairs	Easy	53.9%	37.5%	MathDynamic ProgrammingMemoization
Integer to Roman	Medium	70.4%	37.5%	Hash TableMathString

Showing 14 of 14 questions