Make It Connected

dsu, graphs, greedy

Let's Go Hiking

games, greedy

Bandit in a City

binary search, dfs and similar, graphs, greedy, trees

Multiple Testcases

binary search, constructive algorithms, data structures, greedy, sortings, two pointers

River Locks

binary search, dp, greedy, math

Array Splitting

greedy, sortings

Salary Changing

binary search, greedy, sortings

Beautiful Sequence

brute force, constructive algorithms, greedy

MinOr Tree

bitmasks, dfs and similar, dsu, graphs, greedy

Permutation Restoration

binary search, data structures, greedy, math, sortings, two pointers

Vanya and Scales

brute force, dp, greedy, math, meet-in-the-middle, number theory

1D Sokoban

binary search, dp, greedy, implementation, two pointers

Permutation Graph

binary search, constructive algorithms, data structures, divide and conquer, greedy, shortest paths

Necklace Assembly

brute force, dfs and similar, dp, graphs, greedy, number theory

Yet Another Subarray Problem

dp, greedy, math

Burenka and Traditions (hard version)

data structures, dp, greedy

Tree XOR

bitmasks, dfs and similar, dp, greedy, trees

Binary Table (Hard Version)

constructive algorithms, graphs, greedy, implementation

2+ doors

2-sat, bitmasks, graphs, greedy

Maximal GCD

constructive algorithms, greedy, math

Pavel and Triangles

brute force, dp, fft, greedy, ternary search

Reset K Edges

binary search, data structures, dfs and similar, graphs, greedy, trees

Dances (Hard Version)

binary search, greedy, sortings, two pointers

Serval and Rooted Tree

binary search, dfs and similar, dp, greedy, trees

GameGame

bitmasks, constructive algorithms, dp, games, greedy, math

Black Cells

binary search, brute force, greedy, math

Absolute Beauty

greedy, math

Obtain a Permutation

greedy, implementation, math

Restore Permutation

binary search, data structures, greedy, implementation

Progressions Covering

data structures, greedy

Teleporters (Hard Version)

binary search, greedy, sortings

Paths on the Tree

dfs and similar, dp, greedy, sortings, trees

Bouncing Boomerangs

constructive algorithms, greedy, implementation

Survey in Class

brute force, data structures, greedy, implementation, sortings

Dreamoon and Sets

constructive algorithms, greedy, math

Madoka and The Corruption Scheme

combinatorics, constructive algorithms, greedy, math

Pairs

binary search, constructive algorithms, greedy, two pointers

Restore the Permutation

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

Lorry

greedy, sortings

Equalize the Remainders

data structures, greedy, implementation

Balanced Removals (Harder)

binary search, constructive algorithms, divide and conquer, greedy, implementation, sortings

Archaeology

brute force, constructive algorithms, greedy, strings

Checkpoints

brute force, constructive algorithms, greedy, math, probabilities

Same Sum Blocks (Hard)

data structures, greedy

Hexagons

brute force, constructive algorithms, greedy, implementation, math, shortest paths

Rudolf and CodeVid-23

bitmasks, dp, graphs, greedy, shortest paths

Rescheduling the Exam

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

Split Plus K

greedy, math, number theory

Birthday Gift

bitmasks, brute force, constructive algorithms, greedy, implementation

Arthur and Table

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

Amr and Chemistry

brute force, graphs, greedy, math, shortest paths

Tenzing and His Animal Friends

constructive algorithms, graphs, greedy

Reverse Sort Sum

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

Koa and the Beach (Easy Version)

brute force, dp, greedy

Microcycle

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

Same Sum Blocks (Easy)

greedy

Tavas and Malekas

greedy, hashing, string suffix structures, strings

Lonely Mountain Dungeons

brute force, data structures, greedy, math, ternary search

Tavas and Karafs

binary search, greedy, math

Programming Competition

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

Escape The Maze (hard version)

dfs and similar, dp, greedy, shortest paths, trees

N Problems During K Days

constructive algorithms, greedy, math

A Game with Traps

binary search, dp, greedy, sortings

Professor Higashikata

data structures, dsu, greedy, implementation, strings

Unlucky Numbers

brute force, dp, greedy, implementation

Social Circles

greedy, math

Tree Reconstruction

constructive algorithms, data structures, graphs, greedy

Stars Drawing (Hard Edition)

binary search, dp, greedy

The Butcher

geometry, greedy, implementation, sortings, two pointers

Tokitsukaze and Two Colorful Tapes

constructive algorithms, dfs and similar, graphs, greedy

Johnny and Grandmaster

greedy, implementation, math, sortings

Two Chess Pieces

dfs and similar, dp, greedy, trees

Game of the Rows

brute force, greedy, implementation

Music Festival

binary search, data structures, dp, greedy, sortings

Recover the String

constructive algorithms, greedy, implementation, math

Bookshelves

bitmasks, dp, greedy

Spanning Tree with One Fixed Degree

constructive algorithms, dfs and similar, dsu, graphs, greedy

Generating Sets

binary search, data structures, dfs and similar, greedy, strings, trees

Magazine Ad

binary search, greedy

Nezzar and Binary String

data structures, greedy

Mahmoud and Ehab and another array construction task

constructive algorithms, greedy, math, number theory

Single-use Stones

binary search, flows, greedy, two pointers

Ciel and Duel

dp, flows, greedy

Credit Card

data structures, dp, greedy, implementation

Vlad and Trouble at MIT

dfs and similar, dp, flows, graphs, greedy, implementation, trees

Read Time

binary search, greedy, two pointers

Innokenty and a Football League

2-sat, graphs, greedy, implementation, shortest paths, strings

Unordered Subsequence

constructive algorithms, greedy

Train Hard, Win Easy

constructive algorithms, greedy, math, sortings

Minimum path

greedy

Segments

greedy, sortings

Missing Numbers

binary search, constructive algorithms, greedy, math, number theory

Fancy Number

brute force, greedy, sortings, strings

Cunning Gena

bitmasks, dp, greedy, sortings

Handshakes

binary search, constructive algorithms, data structures, greedy

Dense Subsequence

data structures, greedy, strings

Changing Array

greedy, implementation

Privatization of Roads in Treeland

binary search, constructive algorithms, dfs and similar, graphs, greedy, trees

Skills

binary search, brute force, dp, greedy, sortings, two pointers

Two Heaps

combinatorics, constructive algorithms, greedy, implementation, math, sortings