Problems for Round

Infinite Sequence

Restoring Painting

Money Transfers

Tree Construction

Trains and Statistic

Nicholas and Permutation

Pyramid of Glasses

Vasya and String

Theseus and labyrinth

The Last Fight Between Human and AI

Vanya and Fence

模拟 · 概率论

Vanya and Food Processor

Vanya and Label

Vanya and Treasure

图论 · 广度优先搜索 BFS · 图遍历 · 最短路 · 根号分治

Vanya and Balloons

Johny Likes Numbers

The Same Calendar

Joty and Chocolate

Iterated Linear Function

矩阵加速 · 矩阵乘法 · 逆元

Another Sith Tournament

状压 DP

Lena and Queries

李超线段树 · 线段树分治

Bear and Prime 100

素数判断,质数,筛法

Bear and Tower of Cubes

二分

Bear and Square Grid

字符串 · 搜索 · 连通块

Bear and Chase

Bear and Bad Powers of 42

Bear and Five Cards

Bear and Finding Criminals

A Good Contest

Economy Game

Heap Operations

Gifts by the List

Runaway to a Shadow

Alyona and Numbers

Alyona and Mex

Alyona and the Tree

Alyona and Strings

动态规划 DP

Alyona and Triangles

Robbers' watch

Kay and Snowflake

深度优先搜索 DFS · 树的重心

Optimal Point

Kay and Eternity

Travelling Through the Snow Queen's Kingdom

Free Ice Cream

Little Robber Girl's Zoo

NP-Hard Problem

并查集 · 深度优先搜索 DFS · 二分图

Remainders Game

The Values You Can Make

Dividing Kingdom II

贪心 · 并查集