Bouncing Boomerangs

constructive algorithms, greedy, implementation

Xum

bitmasks, constructive algorithms, math, matrices, number theory

Unshuffling a Deck

constructive algorithms, implementation

Rock, Paper, Scissors

brute force, constructive algorithms, flows, greedy, math

Non-zero Segments

constructive algorithms, data structures, greedy, sortings

Increase and Copy

binary search, constructive algorithms, math

Huge Boxes of Animal Toys

constructive algorithms

Bubble Cup hypothesis

bitmasks, constructive algorithms, dp, math

Hexagons

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

Palindromifier

constructive algorithms, strings

Putting Bricks in the Wall

constructive algorithms, implementation

Pokémon Army (easy version)

constructive algorithms, dp, greedy

Decryption

constructive algorithms, implementation, math, number theory

Sage's Birthday (hard version)

binary search, brute force, constructive algorithms, greedy, sortings, two pointers

Sage's Birthday (easy version)

binary search, constructive algorithms, greedy, sortings

Stairs

brute force, constructive algorithms, greedy, implementation, math

Make Them Equal

constructive algorithms, greedy, math

New Game Plus!

constructive algorithms, greedy, math

XOR-gun

bitmasks, brute force, constructive algorithms

Finding Sasuke

constructive algorithms, math

Two Different

constructive algorithms, divide and conquer

Arrays Sum

constructive algorithms, greedy, math

Circle Coloring

constructive algorithms

Egor in the Republic of Dagestan

constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths

Chocolate Bunny

constructive algorithms, interactive, math, two pointers

Ahahahahahahahaha

constructive algorithms, math

Three Sequences

constructive algorithms, data structures, greedy, math

Link Cut Centroids

constructive algorithms, dfs and similar, graphs, trees

Array Cancellation

constructive algorithms, implementation

Permutation Forgery

constructive algorithms

Game of Pairs

constructive algorithms, dfs and similar, interactive, math, number theory

Fixed Point Removal

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

Mere Array

constructive algorithms, math, number theory, sortings

Ternary Sequence

constructive algorithms, greedy, math

Distance and Axis

constructive algorithms, math

Binary String Reconstruction

2-sat, brute force, constructive algorithms, greedy

String Similarity

constructive algorithms, strings

Binary String To Subsequences

constructive algorithms, data structures, greedy, implementation

Distance Matching

constructive algorithms, dfs and similar, trees

Stoned Game

brute force, constructive algorithms, games, greedy

Multiples of Length

constructive algorithms, greedy, number theory

Boboniu Plays Chess

constructive algorithms

Pinkie Pie Eats Patty-cakes

constructive algorithms, greedy, math, sortings

Applejack and Storages

constructive algorithms, data structures, greedy, implementation

Omkar and Landslide

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

Omkar and Duck

bitmasks, constructive algorithms, interactive, math

Pairs of Pairs

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

505

bitmasks, brute force, constructive algorithms, dp, greedy, implementation

Suborrays

constructive algorithms, math

LCM Problem

constructive algorithms, greedy, math, number theory

Colors

*special problem, binary search, constructive algorithms, interactive

Directing Edges

constructive algorithms, dfs and similar, graphs

Koa and the Beach (Hard Version)

constructive algorithms, dp, greedy, implementation

Common Prefixes

constructive algorithms, greedy, strings

Rearrange

brute force, constructive algorithms, graphs, greedy, sortings

GameGame

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

Mastermind

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

Prefix Flip (Hard Version)

constructive algorithms, data structures, implementation, strings, two pointers

Prefix Flip (Easy Version)

constructive algorithms, data structures, strings

Berserk And Fireball

constructive algorithms, greedy, implementation, math, two pointers

Inverse Genealogy

constructive algorithms, divide and conquer, dp, math, trees

Set Merging

constructive algorithms, divide and conquer

Tree Modification

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

Integer Game

constructive algorithms, games, interactive, math

Inversion SwapSort

constructive algorithms, greedy, sortings

Replace by MEX

brute force, constructive algorithms, sortings

Element Extermination

constructive algorithms, data structures, greedy

Neighbor Grid

constructive algorithms, greedy

Sign Flipping

constructive algorithms, math

Cyclic Shifts Sorting

brute force, constructive algorithms, implementation, sortings

Network Coverage

binary search, constructive algorithms, data structures, greedy

Sum of Digits

brute force, constructive algorithms, dp, greedy

Omkar and Baseball

constructive algorithms, math

Omkar and Completion

constructive algorithms, implementation

Grid-00100

constructive algorithms, greedy, implementation

Binary Subsequence Rotation

binary search, constructive algorithms, data structures, greedy

GCD Compression

constructive algorithms, math, number theory

Ski Accidents

constructive algorithms, graphs, greedy

Even Picture

constructive algorithms

Codeforces Subsequences

brute force, constructive algorithms, greedy, math, strings

Task On The Board

constructive algorithms, greedy, implementation, sortings

Social Distance

constructive algorithms, greedy, math

Two Arrays

binary search, brute force, combinatorics, constructive algorithms, dp, two pointers

Two Divisors

constructive algorithms, math, number theory

Secure Password

bitmasks, combinatorics, constructive algorithms, interactive, math

Swaps Again

constructive algorithms, implementation, sortings

Maximum Subsequence Value

brute force, constructive algorithms

Solve The Maze

constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, shortest paths

Rotation Matching

constructive algorithms, data structures, greedy, implementation

Trouble Sort

constructive algorithms, implementation

X-OR

bitmasks, constructive algorithms, divide and conquer, interactive, probabilities

Ehab's Last Corollary

constructive algorithms, dfs and similar, graphs, greedy, implementation, trees

Ehab and Prefix MEXs

brute force, constructive algorithms, greedy

Johnny and Megan's Necklace

binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs

Johnny and Contribution

constructive algorithms, graphs, greedy, sortings

Binary Median

binary search, bitmasks, brute force, constructive algorithms

A/B Matrix

constructive algorithms, greedy, math

Spy-string

bitmasks, brute force, constructive algorithms, dp, hashing, strings

Similar Pairs

constructive algorithms, graph matchings, greedy, sortings

Tasty Cookie

binary search, constructive algorithms, greedy, implementation