Credit Card

data structures, dp, greedy, implementation

Shop Game

data structures, greedy, math, sortings

Vlad and Trouble at MIT

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

Ciel and Duel

dp, flows, greedy

Single-use Stones

binary search, flows, greedy, two pointers

Mahmoud and Ehab and another array construction task

constructive algorithms, greedy, math, number theory

Nezzar and Binary String

data structures, greedy

Magazine Ad

binary search, greedy

Generating Sets

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

Spanning Tree with One Fixed Degree

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

Bookshelves

bitmasks, dp, greedy

Recover the String

constructive algorithms, greedy, implementation, math

Music Festival

binary search, data structures, dp, greedy, sortings

Game of the Rows

brute force, greedy, implementation

Two Chess Pieces

dfs and similar, dp, greedy, trees

Johnny and Grandmaster

greedy, implementation, math, sortings

Tokitsukaze and Two Colorful Tapes

constructive algorithms, dfs and similar, graphs, greedy

The Butcher

geometry, greedy, implementation, sortings, two pointers

Stars Drawing (Hard Edition)

binary search, dp, greedy

Tree Reconstruction

constructive algorithms, data structures, graphs, greedy

Social Circles

greedy, math

Unlucky Numbers

brute force, dp, greedy, implementation

Professor Higashikata

data structures, dsu, greedy, implementation, strings

N Problems During K Days

constructive algorithms, greedy, math

A Game with Traps

binary search, dp, greedy, sortings

Escape The Maze (hard version)

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

Programming Competition

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

Tavas and Karafs

binary search, greedy, math

Lonely Mountain Dungeons

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

Same Sum Blocks (Easy)

greedy

Tavas and Malekas

greedy, hashing, string suffix structures, strings

Microcycle

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

Koa and the Beach (Easy Version)

brute force, dp, greedy

Reverse Sort Sum

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

Amr and Chemistry

brute force, graphs, greedy, math, shortest paths

Tenzing and His Animal Friends

constructive algorithms, graphs, greedy

Arthur and Table

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

Split Plus K

greedy, math, number theory

Birthday Gift

bitmasks, brute force, constructive algorithms, greedy, implementation

Rescheduling the Exam

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

Hexagons

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

Rudolf and CodeVid-23

bitmasks, dp, graphs, greedy, shortest paths

Same Sum Blocks (Hard)

data structures, greedy

Checkpoints

brute force, constructive algorithms, greedy, math, probabilities

Archaeology

brute force, constructive algorithms, greedy, strings

Balanced Removals (Harder)

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

Equalize the Remainders

data structures, greedy, implementation

Lorry

greedy, sortings

Restore the Permutation

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

Pairs

binary search, constructive algorithms, greedy, two pointers

Madoka and The Corruption Scheme

combinatorics, constructive algorithms, greedy, math

Dreamoon and Sets

constructive algorithms, greedy, math

Survey in Class

brute force, data structures, greedy, implementation, sortings

Bouncing Boomerangs

constructive algorithms, greedy, implementation

Paths on the Tree

dfs and similar, dp, greedy, sortings, trees

Teleporters (Hard Version)

binary search, greedy, sortings

Progressions Covering

data structures, greedy

Restore Permutation

binary search, data structures, greedy, implementation

Obtain a Permutation

greedy, implementation, math

Absolute Beauty

greedy, math

Black Cells

binary search, brute force, greedy, math

GameGame

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

Serval and Rooted Tree

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

Reset K Edges

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

Dances (Hard Version)

binary search, greedy, sortings, two pointers

Pavel and Triangles

brute force, dp, fft, greedy, ternary search

Maximal GCD

constructive algorithms, greedy, math

2+ doors

2-sat, bitmasks, graphs, greedy

Binary Table (Hard Version)

constructive algorithms, graphs, greedy, implementation

Tree XOR

bitmasks, dfs and similar, dp, greedy, trees

Burenka and Traditions (hard version)

data structures, dp, greedy

Necklace Assembly

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

Permutation Graph

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

Yet Another Subarray Problem

dp, greedy, math

1D Sokoban

binary search, dp, greedy, implementation, two pointers

Vanya and Scales

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

Permutation Restoration

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

MinOr Tree

bitmasks, dfs and similar, dsu, graphs, greedy

Beautiful Sequence

brute force, constructive algorithms, greedy

Salary Changing

binary search, greedy, sortings

Array Splitting

greedy, sortings

Multiple Testcases

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

River Locks

binary search, dp, greedy, math

Let's Go Hiking

games, greedy

Bandit in a City

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

Make It Connected

dsu, graphs, greedy

Nearest Beautiful Number (easy version)

binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy

Genius's Gambit

bitmasks, constructive algorithms, greedy, math

Education

brute force, dp, greedy, implementation

Binary Literature

constructive algorithms, greedy, implementation, strings, two pointers

Cow and Fields

binary search, data structures, dfs and similar, graphs, greedy, shortest paths, sortings

Skyscrapers (hard version)

data structures, dp, greedy

String Reversal

data structures, greedy, strings

Three Bags

constructive algorithms, greedy

Beautiful Array

brute force, data structures, divide and conquer, dp, greedy

Painting the Array I

constructive algorithms, data structures, dp, greedy, implementation

K-periodic Garland

brute force, dp, greedy

Fill The Bag

bitmasks, greedy

Shichikuji and Power Grid

dsu, graphs, greedy, shortest paths, trees

Dr. Evil Underscores

bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees