Math

570 LeetCode questions

Difficulty Distribution

Easy
145
25%
Medium
280
49%
Hard
145
25%

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Questions

TitleDifficulty
Random Pick with WeightMedium
Perfect SquaresMedium
Climbing StairsEasy
Smallest Divisible Digit Product IIHard
Smallest Divisible Digit Product IEasy
Reverse IntegerMedium
Happy NumberEasy
Palindrome NumberEasy
Rotate ArrayMedium
Water BottlesEasy
Roman to IntegerEasy
Bulb SwitcherMedium
Count PrimesMedium
Plus OneEasy
Fibonacci NumberEasy
Nth DigitMedium
Count Partitions with Even Sum DifferenceEasy
Add Two NumbersMedium
Integer BreakMedium
Rotate ImageMedium
Find the Winner of the Circular GameMedium
Perfect NumberEasy
Unique PathsMedium
Number of Good PairsEasy
Integer to RomanMedium
Maximum Number of Balls in a BoxEasy
Largest Odd Number in StringEasy
Pow(x, n)Medium
Add Two IntegersEasy
Maximum SwapMedium
Rotate FunctionMedium
N-th Tribonacci NumberEasy
Count All Valid Pickup and Delivery OptionsHard
Basic Calculator IIMedium
Smallest Range IIMedium
Nim GameEasy
Sum of All Subset XOR TotalsEasy
Missing NumberEasy
Next Greater Element IIIMedium
Add DigitsEasy
Count Ways to Build Rooms in an Ant ColonyHard
Preimage Size of Factorial Zeroes FunctionHard
Smallest Range IEasy
Add BinaryEasy
Minimum Moves to Equal Array Elements IIIEasy
Basic CalculatorHard
Check If Digits Are Equal in String After Operations IIHard
Insert Delete GetRandom O(1)Medium
Insert Delete GetRandom O(1) - Duplicates allowedHard
Find the Child Who Has the Ball After K SecondsEasy
Fizz BuzzEasy
Detonate the Maximum BombsMedium
Minimize Rounding Error to Meet TargetMedium
Add StringsEasy
Convert to Base -2Medium
Robot Bounded In CircleMedium
Number of Ways to Build House of CardsMedium
Consecutive Numbers SumHard
Number of Different Subsequences GCDsHard
Angle Between Hands of a ClockMedium
Total Waviness of Numbers in Range IMedium
Number of Ways to Assign Edge Weights IMedium
Find Missing and Repeated ValuesEasy
Multiply StringsMedium
K Closest Points to OriginMedium
Allocate MailboxesHard
Sqrt(x)Easy
Sell Diminishing-Valued Colored BallsMedium
Integer to English WordsHard
Minimum Jumps to Reach End via Prime TeleportationMedium
Minimum Absolute Distance Between Mirror PairsMedium
Minimum Operations to Make a Uni-Value GridMedium
Rotated DigitsMedium
Lexicographically Smallest Negated Permutation that Sums to TargetMedium
Total Waviness of Numbers in Range IIHard
Sum of Two IntegersMedium
The kth Factor of nMedium
Permutation SequenceHard
Find the K-th Character in String Game IEasy
Sum of Square NumbersMedium
Evaluate Reverse Polish NotationMedium
Max Points on a LineHard
Divide Two IntegersMedium
Power of TwoEasy
Arranging CoinsEasy
Magic Squares In GridMedium
Greatest Common Divisor of StringsEasy
Excel Sheet Column TitleEasy
Ugly NumberEasy
Nth Magical NumberHard
Elimination GameMedium
Concatenation of Consecutive Binary NumbersMedium
Fancy SequenceHard
Sum of Absolute Differences in a Sorted ArrayMedium
Count Good NumbersMedium
Base 7Easy
Power of ThreeEasy
Perfect RectangleHard
Unique Binary Search TreesMedium
Smallest Even MultipleEasy

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