Binary Key

dp, greedy, implementation

Hide-and-Seek

geometry, implementation

Tractor College

implementation, math, number theory, ternary search

Berland Local Positioning System

constructive algorithms, greedy, hashing, implementation

Game

games, implementation

Chips Puzzle

constructive algorithms, implementation, math

Sereja and Tree

graphs, implementation

Project Manager

brute force, data structures, implementation

Refactoring

greedy, implementation, strings

Finals in arithmetic

constructive algorithms, implementation, math

Tanks

dp, greedy, implementation

Vus the Cossack and a Graph

dfs and similar, graphs, greedy, implementation

Two Tanks

binary search, dp, implementation, math

Complete Mirror

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

Hot is Cold

bitmasks, data structures, divide and conquer, implementation

Anniversary

data structures, implementation, math, matrices, number theory

Trees and XOR Queries Again

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

Population Size

greedy, implementation, math

New Year and the Acquaintance Estimation

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

Array Equalizer

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

Labeling the Tree with Distances

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

Magician and Pigs (Easy Version)

brute force, data structures, implementation

Pokémon Arena

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

Little Artem and Random Variable

dp, implementation, math, probabilities

Transmitting Levels

dp, implementation

Travel Plan

combinatorics, dp, implementation, math, trees

Palindromic Paths

implementation, interactive

Bear and Square Grid

dfs and similar, dsu, implementation

Coloring

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

Interactive Game with Coloring

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

Restore the Permutation by Sorted Segments

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

Cyclic Shifts Sorting

brute force, constructive algorithms, implementation, sortings

New Year and Rainbow Roads

graphs, greedy, implementation

The Fox and the Complete Tree Traversal

constructive algorithms, dp, implementation, math, trees

Red-Blue Matrix

brute force, constructive algorithms, implementation, sortings

Four Points

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

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

Walk the Runway

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

Drazil Likes Heap

constructive algorithms, data structures, greedy, implementation

Too Many Impostors (hard version)

constructive algorithms, implementation, interactive, math

Red-Blue Operations (Hard Version)

binary search, constructive algorithms, greedy, implementation, math

Colorful Operations

brute force, data structures, implementation

MEX Tree

combinatorics, dfs and similar, implementation, math, trees

DeadLee

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

Editorial for Two

binary search, data structures, greedy, implementation

Are You Fired?

constructive algorithms, data structures, greedy, implementation

Divide Square

data structures, geometry, implementation, sortings

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Berland Square

implementation, math

Inquisition

geometry, implementation, sortings

Race

brute force, implementation

Domino Carpet

dp, implementation

Polycarpus is Looking for Good Substrings

bitmasks, hashing, implementation

Pasha and Pipe

binary search, brute force, combinatorics, dp, implementation

Race

brute force, implementation, two pointers

Dima and Kicks

brute force, dsu, graphs, implementation

Sweets for Everyone!

binary search, greedy, implementation

Rats

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

Widget Library

dp, expression parsing, graphs, implementation

Vanya and Balloons

binary search, brute force, dp, implementation

Chip Play

brute force, data structures, implementation

Downloading B++

binary search, implementation

Edo and Magnets

brute force, greedy, implementation, two pointers

The Coronation

graphs, implementation

Monsters and Potions

brute force, dp, greedy, implementation

Zbazi in Zeydabad

data structures, implementation

Beautiful Road

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

Vasya and Templates

greedy, implementation, strings

Similar Sets

data structures, graphs, implementation

Graph Traveler

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

Teams Formation

data structures, implementation

wxhtzdy ORO Tree

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

Guess Your Way Out! II

data structures, implementation, sortings

City Union

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

Lock Puzzle

constructive algorithms, implementation, strings

Bamboo Partition

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

Mice problem

geometry, implementation, math, sortings

Rectangle Shrinking

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

Maximum path

dp, greedy, implementation

Columns Swaps

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

Exotic Queries

data structures, implementation, sortings

Queue in the Train

data structures, greedy, implementation

Robot Cleaner Revisit

implementation, math, probabilities

Chips

constructive algorithms, implementation

Sonya and Matrix

brute force, constructive algorithms, implementation

st-Spanning Tree

dsu, graphs, greedy, implementation

Rubik's Cube Coloring (hard version)

brute force, dp, implementation, math, trees

Non-Intersecting Subpermutations

combinatorics, dp, implementation, math

AmShZ and G.O.A.T.

binary search, brute force, greedy, implementation, math

Yet Another Inversions Problem

combinatorics, data structures, dp, implementation, math, number theory

Sum Queries?

data structures, greedy, implementation, math

Alice and the Doll

brute force, data structures, greedy, implementation

New School

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

Excellent Arrays

binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers

Robot on the Board 2

brute force, dfs and similar, graphs, implementation

Merging Towers

data structures, dsu, implementation, trees

Sum of Medians

binary search, brute force, data structures, implementation

Binary Spiders

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

MEX of LCM

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