Triameter

Traveling Salesman Problem

数学

Optimal Reduction

贪心

Build Permutation

数论

Tournament Countdown

数学 · 贪心

Cross Swapping

并查集

Lost Array

快速沃尔什变换 FWT

Everyone Loves to Sleep

模拟

Remove Prefix

贪心

Minimum Varied Number

贪心

Color with Occurrences

动态规划 DP · 贪心

Add Modulo 10

数论

Build a Tree and That Is It

构造

Path Prefixes

倍增 · 二分

Crossmarket

Beautiful Array

构造

Monoblock

2+ doors

2-SAT · 位运算

Long Way Home

斜率优化 · 最短路

Crop Squares

构造 · Ad-hoc

2-3 Moves

数学

Permutation Chain

贪心

Robot in a Hallway

动态规划 DP

Chip Move

动态规划 DP

Swap and Maximum Block

线段树 · 位运算

Bags with Balls

组合数学 · Stirling 数

Madoka and Strange Thoughts

数论

Madoka and Underground Competitions

模拟 · 构造

Madoka and Formal Statement

贪心

Madoka and The Corruption Scheme

组合数学 · 排列组合

Madoka and The Best University

数论 · 素数判断,质数,筛法

Madoka and The First Session

网络流

Burenka and Traditions (hard version)

动态规划 DP · 贪心

Burenka and Traditions (easy version)

动态规划 DP · 贪心

Fibonacci Strings

贪心 · 堆

Tonya and Burenka-179

数学 · 最大公约数 gcd

Permutation for Burenka

贪心 · 笛卡尔树

Impressionism

Burenka, an Array and Queries

Chip Game

Mathematical Circus

数论 · 构造

Fighting Tournament

队列

Burenka Plays with Fractions

Interesting Sum

Corners

Xor-Subsequence (hard version)

动态规划 DP · 字典树 Trie · 位运算

Xor-Subsequence (easy version)

Misha and Paintings

Image

贪心

Deadly Laser

数学