Grid Game

constructive algorithms, games, graph matchings, greedy, interactive

The Most Reckless Defense

bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths

Disks

dfs and similar, geometry, graph matchings, graphs

MST with Matching

bitmasks, brute force, dsu, graph matchings, trees

Replace on Segment

dp, graph matchings

Programming Competition

dfs and similar, dp, graph matchings, greedy, trees

Contingency Plan 2

graph matchings

Good Graph

bitmasks, dfs and similar, graph matchings, graphs, implementation

Double Sort II

dfs and similar, flows, graph matchings, graphs

Dominoes

combinatorics, flows, graph matchings, greedy

Amazing Trick

constructive algorithms, graph matchings, math, probabilities

Koxia and Game

constructive algorithms, data structures, dfs and similar, dsu, flows, games, graph matchings, graphs, implementation

Hero to Zero

graph matchings, math

Access Levels

bitmasks, dsu, flows, graph matchings

House Planning

constructive algorithms, data structures, graph matchings, greedy

Fishermen

flows, graph matchings, greedy

Matching Reduction

brute force, constructive algorithms, dfs and similar, flows, graph matchings, graphs, interactive

Permutation for Burenka

data structures, graph matchings, greedy, math, trees

Madoka and The First Session

constructive algorithms, flows, graph matchings, graphs, implementation

Two Arrays

binary search, games, graph matchings

Euclid Guess

constructive algorithms, flows, graph matchings, math, number theory

Star MST

combinatorics, dp, graph matchings, math

Sum of Matchings

brute force, combinatorics, constructive algorithms, dfs and similar, graph matchings, greedy, math

Fair Share

constructive algorithms, data structures, dfs and similar, graph matchings, graphs

Making It Bipartite

flows, graph matchings, graphs, number theory

Division by Two and Permutation

constructive algorithms, flows, graph matchings, greedy, math

Maximum Adjacent Pairs

constructive algorithms, graph matchings

Robot and Candies

data structures, graph matchings, greedy

Alice and Recoloring 2

constructive algorithms, flows, graph matchings, greedy

Moment of Bloom

constructive algorithms, dfs and similar, graph matchings, graphs, greedy, trees

Bridge Club

flows, graph matchings, graphs, greedy

Gregor and the Pawn Game

dfs and similar, dp, flows, graph matchings, graphs, greedy, implementation

AquaMoon and Permutations

2-sat, brute force, combinatorics, constructive algorithms, graph matchings, graphs

Excursions

*special problem, constructive algorithms, dfs and similar, flows, graph matchings, graphs

Goblins And Gnomes

brute force, dp, flows, graph matchings

Armchairs

dp, flows, graph matchings, greedy

Cactus Not Enough

dfs and similar, graph matchings, graphs

Button Lock

flows, graph matchings, graphs

New Year's Puzzle

brute force, dp, graph matchings, greedy, sortings

Strange Housing

constructive algorithms, dfs and similar, graph matchings, graphs, greedy

Chef Monocarp

dp, flows, graph matchings, greedy, math, sortings

Valuable Paper

binary search, flows, graph matchings, graphs

Showing Off

flows, graph matchings, greedy, implementation

Bricks

flows, graph matchings, graphs

Bicolored Segments

data structures, dp, graph matchings, sortings

Mastermind

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

Tree Modification

brute force, constructive algorithms, dfs and similar, graph matchings, graphs, trees

Similar Pairs

constructive algorithms, graph matchings, greedy, sortings

Summoning Minions

constructive algorithms, dp, flows, graph matchings, greedy, sortings

New Year and Social Network

data structures, graph matchings, graphs, math, trees

Beautiful League

constructive algorithms, flows, graph matchings

Catowice City

2-sat, dfs and similar, graph matchings, graphs

Rectangle Painting 2

flows, graph matchings, graphs

The Doctor Meets Vader (Medium)

flows, graph matchings, graphs, shortest paths, sortings

Serge and Dining Room

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

Maximize Mex

flows, graph matchings, graphs

Vasya and Endless Credits

dp, flows, graph matchings, graphs, sortings

Privatization of Roads in Berland

flows, graph matchings, graphs

Random Forest Rank

dp, graph matchings, math, trees

Electric Scheme

flows, graph matchings

Last chance

data structures, flows, graph matchings, graphs, trees

Little C Loves 3 II

brute force, constructive algorithms, flows, graph matchings

Session in BSU

binary search, dfs and similar, dsu, graph matchings, graphs

Allowed Letters

bitmasks, flows, graph matchings, graphs, greedy

Round Marriage

binary search, graph matchings, greedy

Sloth

dfs and similar, dp, graph matchings, trees

Exploration plan

binary search, flows, graph matchings, shortest paths

Oleg and chess

data structures, divide and conquer, flows, graph matchings

Recover a functional graph

graph matchings

Tanya is 5!

graph matchings, graphs, greedy, schedules

Hamiltonian Spanning Tree

dfs and similar, dp, graph matchings, greedy, trees

Birthday

graph matchings, strings

Party

bitmasks, brute force, graph matchings

Array and Operations

flows, graph matchings, number theory

Deciphering

flows, graph matchings

BerSU Ball

dfs and similar, dp, graph matchings, greedy, sortings, two pointers

Permanent

dp, graph matchings, math, meet-in-the-middle

Tree

graph matchings

Two Sets

2-sat, dfs and similar, dsu, graph matchings, greedy

George and Interesting Graph

graph matchings

Antichain

dp, graph matchings, greedy

Tidying Up

flows, graph matchings

WTF?

*special problem, graph matchings, implementation, trees

Queue at the School

constructive algorithms, graph matchings, implementation, shortest paths

Wizards and Roads

data structures, divide and conquer, graph matchings, graphs, greedy

Shoe Store

dp, graph matchings, greedy, sortings, two pointers

Brevity is Soul of Wit

graph matchings

Buying Sets

flows, graph matchings

Tetris revisited

constructive algorithms, graph matchings, greedy, math

Traveling Graph

bitmasks, graph matchings, graphs