Problems

Solve coding problems and browse the archive.

1,446 problems

Title
Dance, Dance
New Operator
Expected Repaints for Balls
Binary Search Tree
Maximum Number of Squares
Lost Parentheses
Chess Practice
Document Search
Cyclic Words
Anti-Palindrome

Page 6 of 15

Adjusted Average

Triangle Subsequence

Equal-Length Subarray Sum Difference

Sequence Transformation

Finding Domino Tilings

Square-Free Number

Number of Drawings

Perfect Attendance Award

Numbers Between Multiples and Divisors

All Closed-Walk Lengths

Covering Points with a Square

Number of Roads

Position Exchange

Rockstar Rock Dongho

Artist Lee Dongho

Lee Dongho's Truck

Escape the Hazard Zones

Traffic Enforcement

Maximum Matching in an Almost Bipartite Graph

Substitution Sequence Range Counts

Yongsik Goes to Camp

Sequence Restoration

Youngsik and Friends' Ball Toss

Making the Best Phone Number

Roads of the Northern Country

Youngsik Function

Manhattan Distance on a Four-Row Number Board

Minsik Language Word Sorting

Monkey Who Wants to Move Like a Horse

Binary Power Bishop

Fugitive Monkey

Cutting a Square

Longest Repeated Substring

Planning the Infiltration

Strategy Game Tournament

Pro Gamer Youngsik

Length of a Repunit Multiple

Youngsik's Finger

Counting Crossing Edges

Letters on the Wall

District Partitioning

Choosing Points

I Am Pokemon Master Dasom

Morning Three and Evening Four

Common Permutation

Lighting Fixture

Second Smallest Spanning Tree

Minimum Pairing Cost for Two Sets

Modular Exponentiation

O Yeongsik's Treasure

Making the Best Team

Complete Binary Tree

Sequences of 1 and -1