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173 problems

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Array447 String249 Hash Table190 Math173 Database113 Sorting100 Simulation93 Counting70 Two Pointers70 Bit Manipulation54 Greedy51 Matrix41 Tree40 Depth-First Search39 Binary Tree37 All topics

Easy · 173 results

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TitleSolutionAcceptDifficultyTopics

9. Palindrome NumberVideo

Solution61.0%Easy

Math· 31 companies

13. Roman to IntegerVideo

Solution67.0%Easy

Hash Table, Math +1· 36 companies

66. Plus OneVideo

Solution50.3%Easy

Array, Math· 13 companies

67. Add BinaryVideo

Solution58.4%Easy

Bit Manipulation, Math +2· 17 companies

69. Sqrt(x)Video

Solution42.2%Easy

Binary Search, Math· 17 companies

70. Climbing StairsVideo

Solution54.0%Easy

Dynamic Programming, Math +1· 37 companies

168. Excel Sheet Column TitleVideo

Solution47.9%Easy

Math, String· 10 companies

171. Excel Sheet Column NumberVideo

Solution68.6%Easy

Math, String· 9 companies

202. Happy NumberVideo

Solution60.0%Easy

Hash Table, Math +1· 27 companies

231. Power of TwoVideo

Solution50.5%Easy

Bit Manipulation, Math +1· 11 companies

258. Add DigitsVideo

Solution69.3%Easy

Math, Number Theory +1· 10 companies

263. Ugly NumberVideo

Solution43.9%Easy

Math· 8 companies

268. Missing NumberVideo

Solution72.4%Easy

Array, Binary Search +4· 19 companies

292. Nim GameVideo

Solution60.6%Easy

Brainteaser, Game Theory +1· 6 companies

326. Power of ThreeVideo

Solution51.4%Easy

Math, Recursion· 6 companies

342. Power of FourVideo

Solution52.5%Easy

Bit Manipulation, Math +1· 8 companies

367. Valid Perfect SquareVideo

Solution44.8%Easy

Binary Search, Math· 8 companies

405. Convert a Number to HexadecimalVideo

Solution54.8%Easy

Bit Manipulation, Math· 6 companies

412. Fizz BuzzVideo

Solution75.9%Easy

Math, Simulation +1· 18 companies

415. Add StringsVideo

Solution52.1%Easy

Math, Simulation +1· 14 companies

441. Arranging CoinsVideo

Solution48.7%Easy

Binary Search, Math· 6 companies

492. Construct the RectangleVideo

Solution65.2%Easy

Math· 2 companies

504. Base 7Video

Solution55.3%Easy

Math· 4 companies

507. Perfect NumberVideo

Solution50.6%Easy

Math· 8 companies

509. Fibonacci NumberVideo

Solution74.6%Easy

Dynamic Programming, Math +2· 16 companies

598. Range Addition IIVideo

Solution59.1%Easy

Array, Math· 3 companies

628. Maximum Product of Three NumbersVideo

Solution48.0%Easy

Array, Math +1· 15 companies

728. Self Dividing NumbersVideo

Solution81.3%Easy

Math· 5 companies

762. Prime Number of Set Bits in Binary RepresentationVideo

Solution78.7%Easy

Bit Manipulation, Math· 2 companies

800. Similar RGB ColorVideoPremium

Solution68.6%Easy

Enumeration, Math +1· 1 company

812. Largest Triangle AreaVideo

Solution72.1%Easy

Array, Geometry +1· 3 companies

836. Rectangle OverlapVideo

Solution53.0%Easy

Geometry, Math· 4 companies

883. Projection Area of 3D ShapesVideo

Solution76.9%Easy

Array, Geometry +2· 1 company

892. Surface Area of 3D ShapesVideo

Solution71.2%Easy

Array, Geometry +2· 1 company

908. Smallest Range IVideo

Solution74.0%Easy

Array, Math· 3 companies

914. X of a Kind in a Deck of CardsVideo

Solution30.4%Easy

Array, Counting +3· 2 companies

976. Largest Perimeter TriangleVideo

Solution62.1%Easy

Array, Greedy +2· 5 companies

989. Add to Array-Form of IntegerVideo

Solution45.6%Easy

Array, Math· 4 companies

1025. Divisor GameVideo

Solution72.3%Easy

Brainteaser, Dynamic Programming +2· 7 companies

1030. Matrix Cells in Distance OrderVideo

Solution74.6%Easy

Array, Geometry +3· 1 company

1037. Valid BoomerangVideo

Solution40.5%Easy

Array, Geometry +1· 2 companies

1056. Confusing NumberVideoPremium

Solution49.8%Easy

Math· 1 company

1071. Greatest Common Divisor of StringsVideo

Solution54.1%Easy

Math, String· 7 companies

1085. Sum of Digits in the Minimum NumberVideoPremium

Solution76.6%Easy

Array, Math· 1 company

1103. Distribute Candies to PeopleVideo

Solution68.1%Easy

Math, Simulation

1118. Number of Days in a MonthVideoPremium

Solution59.4%Easy

Math· 1 company

1134. Armstrong NumberVideoPremium

Solution77.8%Easy

Math· 1 company

1137. N-th Tribonacci NumberVideo

Solution63.2%Easy

Dynamic Programming, Math +1· 7 companies

1154. Day of the YearVideo

Solution50.3%Easy

Math, String· 3 companies

1175. Prime ArrangementsVideo

Solution63.3%Easy

Math· 1 company

Showing 1–50 of 173