Inna and Sequence

binary search, data structures, dp, trees

Inna and Dima

dfs and similar, dp, graphs, implementation

Inna and Pink Pony

greedy, implementation

Watching Fireworks is Fun

data structures, dp, math

Counting Rectangles is Fun

brute force, divide and conquer, dp

Subway Innovation

greedy, math, two pointers

Broken Monitor

brute force, constructive algorithms, greedy, implementation

Sereja and the Arrangement of Numbers

graphs, greedy, sortings

Sereja ans Anagrams

binary search, data structures

Dima and Trap Graph

binary search, data structures, dfs and similar, dsu, shortest paths, two pointers

Dima and Salad

dp

Fools and Foolproof Roads

data structures, dfs and similar, dsu, graphs, greedy

Insertion Sort

data structures, dp, implementation, math

Levko and Array

binary search, dp

Pair of Numbers

binary search, brute force, data structures, math, two pointers

Prime Number

math, number theory

Dima and Containers

constructive algorithms, greedy, implementation

Compartments

combinatorics, constructive algorithms, greedy, implementation

Xenia and Hamming

implementation, math

Vasya and Beautiful Arrays

brute force, dp, number theory

Queue

constructive algorithms, dp

Two Heaps

combinatorics, constructive algorithms, greedy, implementation, math, sortings

Jeff and Furik

combinatorics, dp, probabilities

Apple Tree

dfs and similar, number theory, trees

Lucky Common Subsequence

dp, strings

Counting Fridays

*special problem

Triskaidekaphobia

*special problem

Water Tree

data structures, dfs and similar, graphs, trees

Read Time

binary search, greedy, two pointers

Xenia and Dominoes

bitmasks, dfs and similar, dp

Cupboard and Balloons

geometry

Iahub and Permutations

combinatorics, math

Maximal Area Quadrilateral

brute force, geometry

Book of Evil

dfs and similar, divide and conquer, dp, trees

Vasily the Bear and Beautiful Strings

combinatorics, math, number theory

Vasily the Bear and Fly

math

More Reclamation

games

Palindrome

constructive algorithms, dp

Characteristics of Rectangles

binary search, bitmasks, brute force, implementation, sortings

Shave Beaver!

data structures

Block Tower

constructive algorithms, dfs and similar, graphs

Ciel the Commander

constructive algorithms, dfs and similar, divide and conquer, greedy, trees

Ciel and Duel

dp, flows, greedy

Kalila and Dimna in the Logging Industry

dp, geometry

Psychos in a Line

data structures, implementation

Ants

brute force, implementation

Sereja and Subsequences

data structures, dp

Sereja and Periods

binary search, dfs and similar, strings

Ilya and Roads

dp

Memory for Arrays

binary search, bitmasks, greedy

Context Advertising

dp, two pointers

Morning run

binary search, math, two pointers

White, Black and White Again

combinatorics, number theory

Optimizer

data structures, greedy, sortings

Yaroslav and Time

binary search, graphs, shortest paths

Yaroslav and Two Strings

combinatorics, dp

Greg and Friends

combinatorics, dp, graphs, shortest paths

Shaass and Lights

combinatorics, number theory

Copying Data

data structures

Connected Components

data structures, dfs and similar, dp, dsu

Beautiful IP Addresses

brute force

Tree-String Problem

*special problem, dfs and similar, hashing, strings

Main Sequence

greedy, implementation

Permutation Sum

bitmasks, combinatorics, dp, implementation, meet-in-the-middle

Coin Troubles

dp

Yet Another Number Game

dp, games

Rectangle Puzzle

geometry

Beautiful Decomposition

dp, games, greedy, number theory

Little Girl and Problem on Trees

data structures, graphs, trees

Flawed Flow

constructive algorithms, flows, graphs, greedy

Playlist

math, probabilities, sortings

Dominoes

dfs and similar, graphs

Below the Diagonal

constructive algorithms, greedy, math

Choosing Balls

dp

Circle of Numbers

brute force, dfs and similar, implementation

Maxim and Matrix

constructive algorithms, dp, math

Maxim and Restaurant

dp, math, probabilities

Black and White Tree

constructive algorithms, dsu, graphs, greedy, trees

Little Elephant and LCM

binary search, combinatorics, dp, math

Little Elephant and Elections

brute force, combinatorics, dp

Sum

greedy, math

Dormitory

dp, implementation

Table with Letters - 2

brute force, two pointers

Number Transformation

dp, greedy, number theory

Mad Joe

brute force

Building Bridge

geometry, ternary search, two pointers

Robo-Footballer

binary search, geometry

Log Stream Analysis

binary search, brute force, implementation, strings

Hydra

graphs, sortings

XOR on Segment

bitmasks, data structures

Dispute

dfs and similar, graphs, greedy

Challenging Balloons

constructive algorithms

Mirror Box

geometry, implementation

World Eater Brothers

dfs and similar, dp, greedy, trees

Build String

flows, graphs

T-decomposition

dfs and similar, graphs, greedy, trees

Let's Play Osu!

dp, math, probabilities

Merging Two Decks

constructive algorithms, greedy

Table

bitmasks, combinatorics, dp, math

Cactus

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