Three Trees

Stock Trading

Stock Trading

Stock Trading

Blocked Points

Tower of Hanoi

Yet Another Number Sequence

Three Arrays

线段树 · 平衡树

Deleting Substrings

Nineteen

Three matrices

Counting Sticks

Very Beautiful Number

Dominoes

Physical Education and Buns

Lightbulb for Minister

On Number of Decompositions into Multipliers

On Sum of Fractions

On Changing Tree

树状数组 · 前缀和 · 栈

On Sum of Number of Inversions in Permutations

On Iteration of One Well-Known Function

On Segment's Own Points

On Corruption and Numbers

Cards

数学 · 贪心 · 枚举

Painting The Wall

数学 · 概率论 · 期望

Tree and Array

Instant Messanger

Sorting Permutations

Pages

Red and Blue Balls

Inna and Choose Options

Inna and New Matrix of Candies

Inna and Huge Candy Matrix

Dima and Bacteria

Inna and Binary Logic

Vanya and Cards

Sereja and Contests

Team

Roman and Numbers

动态规划 DP · 枚举 · 状态合并 · 进制 · 构造

Nuts

Trees in a Row

Searching for Graph

Upgrading Array

Strictly Positive Matrix

搜索 · 强连通分量 · 栈

Beautiful Pairs of Numbers

Two Rooted Trees

Valera and X

Marathon

Restore Graph

Minesweeper 1D

模拟 · 动态规划 DP