Cards

Multiplication Table

Substring Game in the Lesson

Alex and Julian

Tourism

Gardener Alex

Geolocation

2048 Game

Knights

Perfect Team

Make The Fence Great Again

Game With String

Choose a Square

Graph And Numbers

前缀和 · 容斥原理 · 折半搜索 meet in the middle

CME

Strings Equalization

字符串

Save the Nature

Sequence Sorting

Paint the Tree

Stack Exterminable Arrays

Wooden Raft

Forgetting Things

TV Subscriptions (Hard Version)

TV Subscriptions (Easy Version)

p-binary

Power Products

数学 · 数论 · 哈希 hashing

Rock Is Push

Tree Factory

To Make 1

Math Problem

Box

Messy

Optimal Subsequences (Hard Version)

Optimal Subsequences (Easy Version)

Arson In Berland Forest

Wrong Answer on test 233 (Hard Version)

组合数学 · 逆元

Wrong Answer on test 233 (Easy Version)

Not Same

Distinct Digits

Filling the Grid

Primes and Multiplication

Complete Tripartite

Another Filling the Grid

容斥原理

One Node is Gone

Dawid and Bags of Candies

Ania and Minimizing

Increasing Matrix

Middle-Out

Equalize Prices Again

Social Network (hard version)