Mausoleum

dp

Perishable Roads

dp, graphs, shortest paths

Piglet's Birthday

dp, math, probabilities

Tenzing and Random Real Numbers

bitmasks, dp, graphs, math, probabilities

Ivan the Fool VS Gorynych the Dragon

dp, games, graphs

Good Pairs

binary search, data structures, dp

String Transformation 2

bitmasks, dp, graphs, trees

Path Counting

combinatorics, dp

Two-Paths

data structures, dp, trees

Biathlon Track

binary search, brute force, constructive algorithms, data structures, dp

Triangles

combinatorics, dp

Black, White and Grey Tree

binary search, constructive algorithms, dfs and similar, dp, greedy, trees

Elementary!

*special problem, brute force, dp, strings

Maxim and Increasing Subsequence

dp

Max Correct Set

bitmasks, dp, math

Lucky Numbers (Easy Version)

dp, greedy

Another n-dimensional chocolate bar

dp, math, meet-in-the-middle, number theory

Subarray Cuts

dp

Sereja and Sets

dp

Caterpillar

dfs and similar, dp, graphs, trees

Shrinking Tree

combinatorics, dp

Largest Submatrix 3

dp, hashing

Jeff and Brackets

dp, matrices

Periodical Numbers

combinatorics, dp, number theory

Rectangular Polyline

constructive algorithms, dp, geometry

Kyoya and Train

dp, fft, graphs, math, probabilities

Multiset of Strings

bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees

PE Lesson

dp, math

Transforming Sequence

combinatorics, dp, fft, math

Construct the String

data structures, dp, strings

Guess the number

dp, interactive

Fibonacci String Subsequences

combinatorics, dp, matrices

Mathematical Expression

constructive algorithms, dp, greedy

Ciel and Flipboard

dp, greedy, math

A New Beginning

data structures, dp, geometry, sortings

Eleventh Birthday

combinatorics, dp, math

To Make 1

bitmasks, constructive algorithms, dp, greedy, number theory

Cows and Cool Sequences

dp, math, number theory

Serval and Brain Power

bitmasks, brute force, dp, greedy, implementation, strings

Choosing Two Paths

dfs and similar, dp, greedy, trees

MEX counting

combinatorics, dp, implementation

Graph And Numbers

bitmasks, brute force, combinatorics, dp, meet-in-the-middle

Random Function and Tree

combinatorics, dp, trees

Tree Queries

brute force, dp, trees

Neko Rules the Catniverse (Small Version)

bitmasks, dp, matrices

Crisp String

bitmasks, dp

Raffles

data structures, dp, greedy, math

Falling Sand (Hard Version)

dfs and similar, dp, graphs, greedy

Mod Mod Mod

binary search, dp, math

Keyboard Design

bitmasks, data structures, dp, string suffix structures, strings

Tree Cutting (Hard Version)

combinatorics, dfs and similar, dp, trees

Birthday

data structures, dfs and similar, dp, trees

Lost Array

bitmasks, combinatorics, constructive algorithms, dp, math

Widget Library

dp, expression parsing, graphs, implementation

Julia the snail

data structures, divide and conquer, dp

Beautiful Matrix

combinatorics, data structures, dp

Writing a Song

brute force, dp, strings

Mashtali and Hagh Trees

combinatorics, dp, trees

Matrix Rank (Hard Version)

combinatorics, dp, math, matrices, string suffix structures

Cleaning Robots

dp, trees

Wardrobe

dp, greedy

Formalism for Formalism

bitmasks, dp, math

Dreamoon and Binary

dp, strings

Context Advertising

dp, two pointers

Wall Bars

dp

Superhero's Job

dfs and similar, dp, hashing, math, number theory

Awards For Contestants

brute force, data structures, dp

The Wall (hard)

dp

Double Elimination

dp, implementation

Encryption (hard)

data structures, dp

Xenia and Dominoes

bitmasks, dfs and similar, dp

Tree Elimination

dp, trees

List Generation

combinatorics, dp, math

Dormitory

dp, implementation

PE Lesson

brute force, dp

Information Reform

dp, implementation, trees

Similar Words

dp, hashing, strings, trees

Candies and Stones

divide and conquer, dp

Boolean Function

bitmasks, dp, expression parsing

Foreigner

dp

Numbers on the blackboard

combinatorics, dp

Tachibana Kanade's Tofu

dp

Wise Men (Hard Version)

bitmasks, dp, math

World of Darkraft

dp, games

Erasing Substrings

bitmasks, dp, greedy

Gifts from Grandfather Ahmed

dp, math, number theory

Subarray Cuts

dp

Au Pont Rouge

binary search, dp, strings

Write The Contest

binary search, dp, math

Phys Ed Online

data structures, dp, greedy

Satanic Panic

dp, geometry

Polycarpus the Safecracker

brute force, dp

The Great Julya Calendar

dp

Policeman and a Tree

dp, graphs, trees

Garden

bitmasks, dp, graphs, trees

Little Pony and Elements of Harmony

dp, matrices

Buy One, Get One Free

dp, greedy

AB Tree

dp, greedy, trees

Black Widow

dp, graphs, implementation, math

Puzzle Lover

dp, hashing, strings