Nash Matrix

constructive algorithms, dfs and similar, graphs, implementation

Happy New Year

bitmasks, dp, implementation

Attack on Red Kingdom

games, two pointers

Array Shrinking

dp, greedy

Construct the Binary Tree

brute force, constructive algorithms, trees

Three Integers

brute force, math

Tourism

dp, graphs, probabilities

Double Elimination

dp, implementation

Cow and Treats

binary search, combinatorics, dp, greedy, implementation, math

Kuroni and the Punishment

math, number theory, probabilities

Kuroni and the Score Distribution

constructive algorithms, greedy, implementation, math

Animal Observation (hard version)

data structures, dp, greedy

Animal Observation (easy version)

data structures, dp

1-Trees and Queries

data structures, dfs and similar, shortest paths, trees

Erase Subsequences

dp, strings

Nanosoft

binary search, data structures, dp, implementation

Time to Run

constructive algorithms, graphs, implementation

Water Balance

data structures, geometry, greedy

Berland Beauty

constructive algorithms, dfs and similar, greedy, sortings, trees

String Coloring (hard version)

data structures, dp

Permutation Separation

data structures, divide and conquer

Three Paths on a Tree

dfs and similar, dp, greedy, trees

Xenon's Attack on the Gangs

combinatorics, dfs and similar, dp, greedy, trees

Prefix Enlightenment

dfs and similar, dsu, graphs

Messenger Simulator

data structures

Minimax Problem

binary search, bitmasks, dp

Madhouse (Easy version)

brute force, constructive algorithms, interactive, math

Delete a Segment

brute force, constructive algorithms, data structures, dp, graphs, sortings, trees, two pointers

New Year and Castle Construction

combinatorics, geometry, math, sortings

New Year and Conference

binary search, data structures, hashing, sortings

DIY Garland

constructive algorithms, greedy, trees

The Cake Is a Lie

constructive algorithms, data structures, dfs and similar, graphs

Enchanted Artifact

constructive algorithms, interactive, strings

Miss Punyverse

dp, greedy, trees

Jeremy Bearimy

dfs and similar, graphs, greedy, trees

Tests for problem D

constructive algorithms, dfs and similar, divide and conquer, trees

Segment Tree

data structures, dsu, graphs, trees

Beautiful Rectangle

brute force, combinatorics, constructive algorithms, data structures, greedy, math

Two Bracket Sequences

dp, strings, two pointers

Common Number

binary search, combinatorics, dp, math

Portals

data structures, dp, greedy, implementation, sortings

Divide Points

constructive algorithms, geometry, math

K Integers

binary search, data structures

Domino for Young

dp, greedy, math

Key Storage

combinatorics, math

Apprentice Learning Trajectory

Spaceship Solitaire

data structures, greedy, implementation

Decreasing Debts

constructive algorithms, data structures, graphs, greedy, implementation, math, two pointers

Beautiful Mirrors

data structures, dp, math, probabilities

Beautiful Mirrors with queries

data structures, probabilities

Economic Difficulties

data structures, dfs and similar, dp, flows, graphs, trees

Editor

data structures, implementation

Tournament

brute force, dp, greedy

Make Them Similar

bitmasks, brute force, hashing, meet-in-the-middle

The Contest

data structures, dp, greedy

Equalizing Two Strings

constructive algorithms, sortings, strings

Yet Another Division Into Teams

dp, greedy, sortings

Point Ordering

constructive algorithms, geometry, interactive, math

Send Boxes to Alice (Hard Version)

constructive algorithms, greedy, math, number theory, ternary search, two pointers

Cheap Robot

binary search, dsu, graphs, shortest paths, trees

Antenna Coverage

data structures, dp, greedy, sortings

Road Construction

flows, graphs

Addition Robot

data structures, math, matrices

Tiling Terrace

brute force, dp

Performance Review

data structures

Regular Forestation

hashing, trees

Songwriter

greedy, two pointers

Cleaning Robots

dp, trees

Red-White Fence

combinatorics, fft

Voting (Hard Version)

binary search, data structures, greedy

Voting (Easy Version)

data structures, dp, greedy

Wires

dfs and similar, graphs, greedy

SmartGarden

constructive algorithms, divide and conquer

Discarding Game

dp, greedy, two pointers

The Coronation

graphs, implementation

Trip to Saint Petersburg

data structures

Maximum Weight Subset

dp, trees

The World Is Just a Programming Task (Easy Version)

brute force, dp, greedy, implementation

Daniel and Spring Cleaning

bitmasks, brute force, combinatorics, dp

Hyakugoku and Ladders

dp, probabilities, shortest paths

Running in Pairs

constructive algorithms, greedy, math

Chips

constructive algorithms, implementation

Minimizing Difference

binary search, constructive algorithms, greedy, sortings, ternary search, two pointers

The Football Season

brute force, math, number theory

Sum Balance

bitmasks, dfs and similar, dp, graphs

Catowice City

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

Queue in the Train

data structures, greedy, implementation

The World Is Just a Programming Task (Hard Version)

implementation

The Maximum Subtree

dfs and similar, dp, graphs, trees

Keyboard Purchase

bitmasks, dp

Balanced Binary Search Trees

dp, math

Balanced Playlist

binary search, data structures, implementation

Alice and the Unfair Game

binary search, data structures, dp, dsu

Alice and the Doll

brute force, data structures, greedy, implementation

Yet Another Substring Reverse

bitmasks, dp

Special Permutations

math

Middle-Out

constructive algorithms, greedy, strings

One Node is Gone

constructive algorithms, implementation, trees

Another Filling the Grid

combinatorics, dp, math

Wrong Answer on test 233 (Hard Version)

combinatorics, math