Football

Cunning Gena

动态规划 DP · 排序 · 背包 DP · 状压 DP

Square Table

Big Problems for Organizers

树的直径

Tricky Password

Start Up

Online Meeting

Bug in Code

Cup Trick

Playing the ball

Pasha and Hamsters

Bug in Code

Squats

Megacity

Magic Formulas

Biathlon Track

Colored Jenga

Sereja and Swaps

贪心 · 枚举

Sereja and Table

Sereja and Two Sequences

Sereja and Squares

Sereja and Sets

动态规划 DP

Sereja and Mugs

Sereja and Mirroring

Police Recruits

Prison Transfer

Checkposts

图论 · 图论建模 · 强连通分量

Match & Catch

动态规划 DP · 后缀自动机 SAM · 哈希 hashing · 后缀数组 SA

Police Patrol

Xor-tree

Working out

Guess the Tree

Tricky Function

枚举 · 分治

Points and Segments

图论 · 离散化 · 二分图

Points and Segments (easy)

Balls Game

Black Square

Shower Line

枚举

k-Tree

动态规划 DP

Random Task

Chemistry Experiment

Choosing Teams

Football Kit

Prime Swaps

数论

Prefixes and Suffixes

后缀自动机 SAM · 哈希 hashing · KMP 算法 · Z 函数

Square Tiling

Kitahara Haruki's Gift

Kuriyama Mirai's Stones

Ryouko's Memory Note

贪心

Nanami's Digital Board