Tokitsukaze and Permutations

dp, math

Getting Deals Done

binary search, data structures

Falling Sand (Easy Version)

dfs and similar, graphs, greedy

Banquet Preparations 2

greedy, sortings, two pointers

Bear and Polynomials

hashing, implementation, math

Last Chance

data structures, implementation, strings

Zip-line

binary search, data structures, dp, hashing

Frogs and mosquitoes

data structures, greedy

k-Maximum Subsequence Sum

data structures, flows, graphs, implementation

Hospital Queue

binary search, graphs, greedy, implementation

Abnormal Permutation Pairs (easy version)

combinatorics, dp, fft, math

Almost Permutation

flows

Bamboo Partition

brute force, data structures, implementation, math, number theory, sortings, two pointers

Vulnerable Kerbals

constructive algorithms, dp, graphs, math, number theory

Boot Camp

*special problem, greedy

Party

bitmasks, brute force, dp, graphs

String

string suffix structures

Li Hua and Array

brute force, data structures, dsu, math, number theory, two pointers

LCM Sum (hard version)

brute force, data structures, math, number theory, two pointers

Happy Tree Party

data structures, dfs and similar, graphs, math, trees

Interactive Game with Coloring

brute force, constructive algorithms, dfs and similar, graphs, implementation, interactive, trees

Digital Wallet

dp, greedy

You

dfs and similar, dp, math, number theory

Vasily the Bear and Fly

math

Hydra

graphs, sortings

Lucky Numbers

dp, greedy

Counting Is Fun (Easy Version)

brute force, combinatorics, dp, math

Doremy's Number Line

dp, greedy, sortings

Interactive Bulls and Cows (Easy)

brute force, constructive algorithms, implementation

Dima and Horses

combinatorics, constructive algorithms, graphs

Beautiful Bracket Sequence (easy version)

combinatorics, dp, probabilities

Inna, Dima and Song

implementation

Help Victoria the Wise

brute force, implementation

Cleaning Robot

bitmasks, dp

Tree Generator™

data structures, implementation, trees

Emotional Fishermen

combinatorics, dp, math, two pointers

Almost Fault-Tolerant Database

brute force, constructive algorithms, dfs and similar, greedy, implementation

XOR Break --- Game Version

bitmasks, games, greedy, interactive

Sports Betting

bitmasks, combinatorics, dp, graphs, math, probabilities

Start of the session

constructive algorithms

Picking Strings

constructive algorithms, implementation, strings

Museums Tour

dp, graphs, implementation

Two Arithmetic Progressions

math, number theory

City Union

constructive algorithms, dfs and similar, dsu, geometry, greedy, implementation, math

Rooks and Rectangles

data structures, sortings

U2

geometry

Lock Puzzle

constructive algorithms, implementation, strings

Non-equal Neighbours

combinatorics, dp, math

Pastoral Oddities

data structures, divide and conquer, dsu, math, trees

80-th Level Archeology

brute force, data structures, greedy, sortings

Iahub and Xors

data structures

Codeforces World Finals

implementation

Name That Tune

dp, probabilities, two pointers

Free Market

dp, greedy

Connectivity Addicts

constructive algorithms, dsu, graphs, greedy, interactive, shortest paths, trees

ANDfinity

bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs

T-Shirts

data structures

Package Delivery

data structures, divide and conquer, greedy

Replace on Segment

dp, graph matchings

Decreasing Game

constructive algorithms, dfs and similar, dp, greedy, interactive

Красивая команда

*special problem, combinatorics, math

Dynamic Problem Scoring

brute force, greedy

Top Secret Task

dp

Tree Queries

dfs and similar, graphs, trees

Sonya and Informatics

combinatorics, dp, matrices, probabilities

Pigeon d'Or

implementation

Distance Learning Courses in MAC

bitmasks, brute force, data structures, greedy, math

Encryption (medium)

dp

Coloring

brute force, combinatorics, constructive algorithms, dp, geometry, graphs, greedy, implementation, math

Fancy Fence

*special problem, data structures, dsu, implementation, math, sortings

Up and Down the Tree

dfs and similar, dp, trees

Bipartite Segments

binary search, data structures, dfs and similar, dsu, graphs, two pointers

Bear and Square Grid

dfs and similar, dsu, implementation

Bus

*special problem, implementation, sortings

A+B (Trial Problem)

*special problem

Tree Queries

data structures, probabilities, trees

Knights

geometry, graphs, shortest paths, sortings

Palindrome Partition

binary search, brute force, data structures, dp, hashing, strings

Distributed Join

greedy

Coprime Arrays

math, number theory

Hill Climbing

dfs and similar, geometry, trees

The penguin's game

binary search, constructive algorithms, interactive

Decomposition

binary search, brute force, data structures, divide and conquer, dp, two pointers

Restore Array

constructive algorithms

Seating of Students

brute force, constructive algorithms, math

Restoring the Expression

brute force, hashing, math

Cool Slogans

string suffix structures, strings

Beautiful Mirrors with queries

data structures, probabilities

String Multiplication

dp, greedy, strings

Cowmpany Cowmpensation

combinatorics, dp, math, trees

Corporation Mail

data structures, expression parsing, implementation

Palindromic Paths

implementation, interactive

Working routine

data structures, implementation

Alice the Fan

dp

Games on a CD

data structures, hashing, string suffix structures, strings

Try and Catch

expression parsing, implementation

Dog Walking

brute force, greedy, math

X-OR

bitmasks, constructive algorithms, divide and conquer, interactive, probabilities

Extending Set of Points

data structures, divide and conquer, dsu

Vasya and Types

implementation, strings