Domino Principle

binary search, data structures, sortings

Yaroslav and Divisors

data structures

Tokitsukaze and Strange Rectangle

data structures, divide and conquer, sortings, two pointers

Random Query

data structures, math, probabilities, two pointers

Cartons of milk

binary search, data structures, greedy, sortings, two pointers

Anya and the Mysterious String

binary search, data structures

Ball Sorting

data structures, dp, sortings

Suspects

constructive algorithms, data structures, implementation

Two Types of Spells

binary search, data structures, greedy, implementation, math, sortings

Petya, Petya, Petr, and Palindromes

binary search, brute force, data structures, two pointers

Divide Square

data structures, geometry, implementation, sortings

Sign on Fence

binary search, constructive algorithms, data structures

Fruit Sequences

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

Subordinates

constructive algorithms, data structures, graphs, greedy, sortings

Points

data structures

Tourists

data structures, dfs and similar, graphs, trees

Fedor and coupons

binary search, data structures, greedy, sortings

Ivan and Burgers

data structures, divide and conquer, greedy, math

Array and Segments (Hard version)

data structures, implementation

New Year Tree

data structures, divide and conquer, trees

Complicated Computations

binary search, data structures, two pointers

Pairwise Modulo

data structures, math

Happy Life in University

data structures, dfs and similar, greedy, trees

Voting (Easy Version)

data structures, dp, greedy

Subset Sums

brute force, data structures

Partition Game

binary search, data structures, divide and conquer, dp

Editorial for Two

binary search, data structures, greedy, implementation

MEX of LCM

binary search, data structures, implementation, math, number theory

Are You Fired?

constructive algorithms, data structures, greedy, implementation

Irrigation

binary search, data structures, implementation, sortings, trees, two pointers

Two Hundred Twenty One (hard version)

data structures, math

LIS of Sequence

data structures, dp, greedy, hashing, math

Teodor is not a liar!

data structures, dp

Spaceship Solitaire

data structures, greedy, implementation

The way home

binary search, data structures, dp, graphs, greedy, shortest paths, sortings

Sofia and Strings

data structures, greedy, sortings, strings, two pointers

Gosha is hunting

brute force, data structures, dp, flows, math, probabilities, sortings

Drazil and Park

data structures

Permutation Sorting

data structures, sortings

Wine Factory (Easy Version)

data structures, greedy

Valera and Queries

binary search, data structures

Game of the Year

brute force, data structures, math, number theory

DeadLee

data structures, dfs and similar, greedy, implementation, sortings

Cyclical Quest

data structures, string suffix structures, strings

Bindian Signalizing

data structures

Ball

data structures, sortings

Infinite Inversions

binary search, data structures, implementation, sortings, trees

Robots on a Grid

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

Card Game Again

binary search, data structures, number theory, two pointers

Bombs

data structures, two pointers

Addition on Segments

bitmasks, data structures, divide and conquer, dp

Lipshitz Sequence

data structures, math

Sorting Books

data structures, dp, greedy

Messenger

data structures, hashing, implementation, string suffix structures, strings

Arithmetic Operations

brute force, data structures, graphs, math

Cloud Computing

data structures, greedy

Time to Raid Cowavans

brute force, data structures, sortings

Check Transcription

brute force, data structures, hashing, strings

High Cry

binary search, bitmasks, combinatorics, data structures, divide and conquer

Mark and Professor Koro

binary search, bitmasks, brute force, combinatorics, data structures, greedy

Welcome home, Chtholly

data structures, dsu

Preparing for the Contest

binary search, data structures, greedy, sortings

Binary Spiders

bitmasks, data structures, implementation, math, sortings, trees

Serge and Dining Room

binary search, data structures, graph matchings, greedy, implementation, math, trees

Let Them Slide

data structures, implementation

Fishes

data structures, graphs, greedy, probabilities, shortest paths

Kefa and Watch

data structures, hashing, strings

Stack Exterminable Arrays

data structures, divide and conquer, dp, hashing

Running with Obstacles

*special problem, data structures, dp, greedy

Mike and Friends

data structures, string suffix structures, strings, trees

Case of Chocolate

data structures

Omkar and Landslide

binary search, constructive algorithms, data structures, greedy, math

Castle Defense

binary search, data structures, greedy, two pointers

Explosions?

binary search, data structures, dp, greedy, math

Sum

data structures, divide and conquer, dp, greedy

Optimal Insertion

data structures, divide and conquer, dp, greedy, sortings

Merging Towers

data structures, dsu, implementation, trees

Sum of Medians

binary search, brute force, data structures, implementation

Accumulator Apex

data structures, implementation, sortings

Fill the Matrix

data structures, greedy, math

Count The Rectangles

bitmasks, brute force, data structures, geometry, sortings

William The Oblivious

bitmasks, data structures, dp, matrices

Graph and Queries

data structures, dsu, graphs, implementation, trees

Avoid Rainbow Cycles

data structures, dsu, graphs, greedy, sortings, trees

Boxes And Balls

data structures, greedy

Copy or Prefix Sum

combinatorics, data structures, dp, sortings

Souvenirs

data structures

Chain Reaction

binary search, data structures, dsu, greedy, implementation, math, number theory

Multidimensional Queries

bitmasks, data structures

Sum Queries?

data structures, greedy, implementation, math

Please, another Queries on Array?

bitmasks, data structures, divide and conquer, math, number theory

Rooter's Song

constructive algorithms, data structures, geometry, implementation, sortings, two pointers

Santa Claus and a Palindrome

constructive algorithms, data structures, greedy

Nastia Plays with a Tree

constructive algorithms, data structures, dfs and similar, dp, dsu, greedy, implementation, trees

Mike and Geometry Problem

combinatorics, data structures, dp, geometry, implementation

Sereja and Subsequences

data structures, dp

The Number Games

data structures, greedy, trees

Anton and Permutation

brute force, data structures

TorCoder

data structures

Colorful Operations

brute force, data structures, implementation