Robot Cleaner Revisit

implementation, math, probabilities

Columns Swaps

2-sat, dfs and similar, dsu, graphs, implementation

Exotic Queries

data structures, implementation, sortings

Queue in the Train

data structures, greedy, implementation

Maximum path

dp, greedy, implementation

Rectangle Shrinking

binary search, brute force, data structures, greedy, implementation, two pointers

Mice problem

geometry, implementation, math, sortings

Bamboo Partition

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

City Union

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

Lock Puzzle

constructive algorithms, implementation, strings

Guess Your Way Out! II

data structures, implementation, sortings

wxhtzdy ORO Tree

binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees

Teams Formation

data structures, implementation

Graph Traveler

brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory

Similar Sets

data structures, graphs, implementation

Vasya and Templates

greedy, implementation, strings

Beautiful Road

dfs and similar, dp, dsu, graphs, implementation, sortings, trees

Zbazi in Zeydabad

data structures, implementation

Monsters and Potions

brute force, dp, greedy, implementation

The Coronation

graphs, implementation

Edo and Magnets

brute force, greedy, implementation, two pointers

Downloading B++

binary search, implementation

Chip Play

brute force, data structures, implementation

Vanya and Balloons

binary search, brute force, dp, implementation

Widget Library

dp, expression parsing, graphs, implementation

Rats

brute force, dfs and similar, graphs, implementation, shortest paths

Sweets for Everyone!

binary search, greedy, implementation

Dima and Kicks

brute force, dsu, graphs, implementation

Race

brute force, implementation, two pointers

Pasha and Pipe

binary search, brute force, combinatorics, dp, implementation

Polycarpus is Looking for Good Substrings

bitmasks, hashing, implementation

Domino Carpet

dp, implementation

Playing Quidditch (Easy)

implementation

Race

brute force, implementation

Inquisition

geometry, implementation, sortings

Berland Square

implementation, math

Playing Quidditch (Medium)

implementation

Playing Quidditch (Hard)

implementation

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Divide Square

data structures, geometry, implementation, sortings

Are You Fired?

constructive algorithms, data structures, greedy, implementation

Editorial for Two

binary search, data structures, greedy, implementation

DeadLee

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

MEX Tree

combinatorics, dfs and similar, implementation, math, trees

Red-Blue Operations (Hard Version)

binary search, constructive algorithms, greedy, implementation, math

Colorful Operations

brute force, data structures, implementation

Too Many Impostors (hard version)

constructive algorithms, implementation, interactive, math

Drazil Likes Heap

constructive algorithms, data structures, greedy, implementation

Walk the Runway

bitmasks, brute force, data structures, dp, graphs, implementation, sortings

Plan of Lectures

constructive algorithms, dfs and similar, dsu, graphs, implementation, sortings, trees

Ehab and the Big Finale

constructive algorithms, divide and conquer, graphs, implementation, interactive, trees

Four Points

brute force, constructive algorithms, flows, geometry, greedy, implementation, math, ternary search

Red-Blue Matrix

brute force, constructive algorithms, implementation, sortings

The Fox and the Complete Tree Traversal

constructive algorithms, dp, implementation, math, trees

New Year and Rainbow Roads

graphs, greedy, implementation

Cyclic Shifts Sorting

brute force, constructive algorithms, implementation, sortings

Restore the Permutation by Sorted Segments

brute force, constructive algorithms, data structures, greedy, implementation

Interactive Game with Coloring

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

Coloring

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

Bear and Square Grid

dfs and similar, dsu, implementation

Palindromic Paths

implementation, interactive

Pokémon Arena

data structures, graphs, greedy, implementation, shortest paths, sortings

Travel Plan

combinatorics, dp, implementation, math, trees

Transmitting Levels

dp, implementation

Little Artem and Random Variable

dp, implementation, math, probabilities

Magician and Pigs (Easy Version)

brute force, data structures, implementation

Labeling the Tree with Distances

data structures, dp, greedy, hashing, implementation, trees

Array Equalizer

binary search, greedy, implementation, math, number theory, sortings, two pointers

New Year and the Acquaintance Estimation

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

Population Size

greedy, implementation, math

Trees and XOR Queries Again

data structures, dfs and similar, divide and conquer, graphs, implementation, math, trees

Anniversary

data structures, implementation, math, matrices, number theory

Hot is Cold

bitmasks, data structures, divide and conquer, implementation

Complete Mirror

constructive algorithms, dfs and similar, dp, hashing, implementation, trees

Two Tanks

binary search, dp, implementation, math

Vus the Cossack and a Graph

dfs and similar, graphs, greedy, implementation

Tanks

dp, greedy, implementation

Finals in arithmetic

constructive algorithms, implementation, math

Refactoring

greedy, implementation, strings

Project Manager

brute force, data structures, implementation

Sereja and Tree

graphs, implementation

Chips Puzzle

constructive algorithms, implementation, math

Game

games, implementation

Berland Local Positioning System

constructive algorithms, greedy, hashing, implementation

Tractor College

implementation, math, number theory, ternary search

Hide-and-Seek

geometry, implementation

Binary Key

dp, greedy, implementation

Domino

brute force, implementation

Escaping on Beaveractor

dfs and similar, implementation

Inverse Function

implementation

Nastia Plays with a Tree

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

GukiZ and GukiZiana

binary search, data structures, implementation

MinimizOR

bitmasks, brute force, data structures, divide and conquer, greedy, implementation, two pointers

Mastermind

constructive algorithms, graph matchings, greedy, implementation, sortings, two pointers

Anton and School

bitmasks, constructive algorithms, implementation, math

Nanosoft

binary search, data structures, dp, implementation

Boxes and Balls

dp, implementation, math

Nene vs. Monsters (Easy Version)

brute force, implementation, math

Almost Fault-Tolerant Database

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

Happy New Year

bitmasks, dp, implementation