Practice
1948 problems, in the order the course teaches them. Every one runs on a real compiler against real test cases.
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1. Print Hello World
Fundamentals · Foundation
0 / 1948
solved
40 of 1948
Hashing & Hash Tables
0 of 40- Not tried281How Many Different ValuesFoundationno data
- Not tried282First Character That Appears OnceCoreno data
- Not tried283Two That Add UpCoreno data
- Not tried284How Often Does the Commonest AppearFoundationno data
- Not tried285Anagram Check with a Hash MapFoundationno data
- Not tried286How Many Subarrays Add Up to KChallengeno data
- Not tried287The Longest Pick Where Values Differ By OneCoreno data
- Not tried288First Value That RepeatsFoundationno data
- Not tried289A Repeat Close ByCoreno data
- Not tried290One Missing, One RepeatedCoreno data
- Not tried291The Most Common WordCoreno data
- Not tried292Same Shape, Different LettersChallengeno data
- Not tried293Can You Build ItFoundationno data
- Not tried294How Many Anagram GroupsCoreno data
- Not tried295The K Most Frequent ValuesCoreno data
- Not tried296Is the Grid Still LegalCoreno data
- Not tried297Add Up What Appears OnceFoundationno data
- Not tried298Quadruples That Cancel OutChallengeno data
- Not tried299Equal Zeros and OnesChallengeno data
- Not tried300Count Pairs With a Given SumCoreno data
- Not tried301Is There a Zero-Sum StretchCoreno data
- Not tried302Ten-Letter Stretches That Appear TwiceCoreno data
- Not tried303At Most K Different CharactersChallengeno data
- Not tried304Order by How OftenCoreno data
- Not tried305Common to All ThreeCoreno data
- Not tried306Most Frequent, Smallest WinsFoundationno data
- Not tried307Longest Stretch Adding to KChallengeno data
- Not tried308Smallest Window Holding EverythingChallengeno data
- Not tried309How Many Stretches Have At Most K ValuesChallengeno data
- Not tried310Same Values, Different OrderFoundationno data
- Not tried311The Longest Palindrome You Can BuildFoundationno data
- Not tried312Equal Counts of Two ValuesChallengeno data
- Not tried313How Many Equal PairsFoundationno data
- Not tried314Appearing More Than a Third of the TimeCoreno data
- Not tried315Longest Stretch Divisible by KChallengeno data
- Not tried316Smallest Window Covering a PatternChallengeno data
- Not tried317Can Everything Be Paired OffChallengeno data
- Not tried318Appearing Exactly TwiceFoundationno data
- Not tried319Distinct Pieces of Length KCoreno data
- Not tried320Scoring the GuessCoreno data