Practice Problems

Daily Challenge: Paths Around the Walls (1500) Solve it to start a streak

Practice Problems

ProblemTopics Solvers Acceptance Difficulty
Collatz Peak math implementation 0 — 1000
Tetrahedral Numbers math 0 — 1000
Order by Last Digit sorting 0 — 1000
Shortest Words First strings sorting 0 — 1000
Abundant Number math 0 — 1000
Automorphic Number math 0 — 1000
Disarium Number math 0 — 1000
Power of Three math 0 — 1000
Valid Integer implementation strings 0 — 1000
Strong Enough Password implementation strings 0 — 1000
Valid Username implementation strings 0 — 1000
Sum of the Others implementation 0 — 1000
Points in the Box geometry 0 — 1000
Bounding Box geometry 1
50%
1000
Three in a Line math geometry 0 — 1000
Equal Pairs implementation 36
77%
1000
The First N Primes math 0 — 1000
12-Hour to 24-Hour implementation 0 — 1000
Mask the Email strings 0 — 1000
The Careful Bank implementation 0 — 1000
First Stockout Day implementation 0 — 1000
Election Night implementation 0 — 1000
Dry Spells implementation 0 — 1000
The Final Exam math 0 — 1000
Doubling Your Money math 0 — 1000
Taxi Fare Bands math 0 — 1000
Bacteria in a Dish math 0 — 1000
Diamond implementation 0 — 1000
The Letter X implementation 0 — 1000
Closest to 21 implementation 0 — 1000
The K-th Cube Number math 0 — 1000
The K-th Triangular Number math 0 — 1000
Count Power Of Twos in a Range math 0 — 1000
The K-th Fibonacci Number math 0 — 1000
Even-Sum Pairs math 0 — 1000
Additive Sequence math implementation 0 — 1000
A True Permutation implementation 0 — 1000
Evening the Counts strings 0 — 1000
How Many Times Does X Appear implementation 0 — 1000
Sort the Flag sorting two-pointers 0 — 1000
Boustrophedon implementation 5
100%
1000
Twice as Large implementation 0 — 1000
Triangular Number Modulo math 0 — 1000
Fibonacci Number math dp 2
33%
1100
Product Modulo 1e9+7 math 0 — 1100
Count Sign Changes implementation 0 — 1100
Majority Element implementation 0 — 1100
Decimal to Base K math 0 — 1100
Candy Rounds implementation 0 — 1100
Palindrome, Roughly strings 0 — 1100