Fruit Sequences

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

Divide Square

data structures, geometry, implementation, sortings

Petya, Petya, Petr, and Palindromes

binary search, brute force, data structures, two pointers

Anya and the Mysterious String

binary search, data structures

Fedor and coupons

binary search, data structures, greedy, sortings

Subordinates

constructive algorithms, data structures, graphs, greedy, sortings

Tourists

data structures, dfs and similar, graphs, trees

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

Ivan and Burgers

data structures, divide and conquer, greedy, math

Voting (Easy Version)

data structures, dp, greedy

Happy Life in University

data structures, dfs and similar, greedy, trees

Are You Fired?

constructive algorithms, data structures, greedy, implementation

Partition Game

binary search, data structures, divide and conquer, dp

Subset Sums

brute force, data structures

Points

data structures

Two Hundred Twenty One (hard version)

data structures, math

Teodor is not a liar!

data structures, dp

Spaceship Solitaire

data structures, greedy, implementation

Editorial for Two

binary search, data structures, greedy, implementation

Drazil and Park

data structures

Gosha is hunting

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

MEX of LCM

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

The way home

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

Sofia and Strings

data structures, greedy, sortings, strings, two pointers

Valera and Queries

binary search, data structures

Irrigation

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

Game of the Year

brute force, data structures, math, number theory

LIS of Sequence

data structures, dp, greedy, hashing, math

DeadLee

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

Wine Factory (Easy Version)

data structures, greedy

Infinite Inversions

binary search, data structures, implementation, sortings, trees

Bindian Signalizing

data structures

Lipshitz Sequence

data structures, math

Cloud Computing

data structures, greedy

Sorting Books

data structures, dp, greedy

Addition on Segments

bitmasks, data structures, divide and conquer, dp

Permutation Sorting

data structures, sortings

Arithmetic Operations

brute force, data structures, graphs, math

Messenger

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

Time to Raid Cowavans

brute force, data structures, sortings

Cyclical Quest

data structures, string suffix structures, strings

Mark and Professor Koro

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

Preparing for the Contest

binary search, data structures, greedy, sortings

Check Transcription

brute force, data structures, hashing, strings

High Cry

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

Ball

data structures, sortings

Binary Spiders

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

Welcome home, Chtholly

data structures, dsu

Robots on a Grid

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

Let Them Slide

data structures, implementation

Bombs

data structures, two pointers

Running with Obstacles

*special problem, data structures, dp, greedy

Serge and Dining Room

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

Case of Chocolate

data structures

Stack Exterminable Arrays

data structures, divide and conquer, dp, hashing

Omkar and Landslide

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

Fishes

data structures, graphs, greedy, probabilities, shortest paths

Kefa and Watch

data structures, hashing, strings

Mike and Friends

data structures, string suffix structures, strings, trees

Sum

data structures, divide and conquer, dp, greedy

Optimal Insertion

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

Explosions?

binary search, data structures, dp, greedy, math

Sum of Medians

binary search, brute force, data structures, implementation

Merging Towers

data structures, dsu, implementation, trees

Castle Defense

binary search, data structures, greedy, two pointers

Avoid Rainbow Cycles

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

Fill the Matrix

data structures, greedy, math

Card Game Again

binary search, data structures, number theory, two pointers

Boxes And Balls

data structures, greedy

Copy or Prefix Sum

combinatorics, data structures, dp, sortings

Souvenirs

data structures

Accumulator Apex

data structures, implementation, sortings

William The Oblivious

bitmasks, data structures, dp, matrices

Graph and Queries

data structures, dsu, graphs, implementation, trees

Multidimensional Queries

bitmasks, data structures

Rooter's Song

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

Santa Claus and a Palindrome

constructive algorithms, data structures, greedy

Please, another Queries on Array?

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

Mike and Geometry Problem

combinatorics, data structures, dp, geometry, implementation

Nastia Plays with a Tree

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

The Number Games

data structures, greedy, trees

Colorful Operations

brute force, data structures, implementation

Addition Robot

data structures, math, matrices

Anton and Permutation

brute force, data structures

TorCoder

data structures

Encrypting Messages

data structures

Colors and Intervals

constructive algorithms, data structures, greedy, sortings

Sereja and Subsequences

data structures, dp

Range Sorting (Hard Version)

binary search, data structures, dp, greedy

Broken BST

data structures, dfs and similar

Number of Groups

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

Count The Rectangles

bitmasks, brute force, data structures, geometry, sortings

Leaving the Bar

brute force, data structures, geometry, greedy, math, sortings

Xor-Subsequence (hard version)

bitmasks, data structures, dp, strings, trees

Two Strings

data structures, dp, strings

Big Maximum Sum

data structures, dp, greedy, implementation, math, trees

Beaver

data structures, dp, greedy, hashing, strings, two pointers