Killjoy

greedy, implementation, math

Mortal Kombat Tower

dp, graphs, greedy, shortest paths

k-Amazing Numbers

binary search, data structures, implementation, two pointers

Bouncing Ball

brute force, dp, implementation

Shurikens

data structures, greedy, implementation

Peaceful Rooks

dfs and similar, dsu, graphs

Two Platforms

binary search, dp, sortings, two pointers

Decrease the Sum of Digits

greedy, math

Discrete Acceleration

binary search, dp, implementation, math, two pointers

Arrays Sum

constructive algorithms, greedy, math

Chocolate Bunny

constructive algorithms, interactive, math, two pointers

Link Cut Centroids

constructive algorithms, dfs and similar, graphs, trees

Balanced Bitstring

implementation, strings

Fancy Fence

*special problem, data structures, dsu, implementation, math, sortings

Maximum Distributed Tree

dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees

Binary String Reconstruction

2-sat, brute force, constructive algorithms, greedy

RPG Protagonist

brute force, greedy, math

Binary String To Subsequences

constructive algorithms, data structures, greedy, implementation

Colored Rectangles

dp, greedy, sortings

Good Subarrays

data structures, dp, math

Power Sequence

brute force, math, number theory, sortings

Stoned Game

brute force, constructive algorithms, games, greedy

Multiples of Length

constructive algorithms, greedy, number theory

Boboniu and Bit Operations

bitmasks, brute force, dp, greedy

Boboniu Chats with Du

dp, greedy, sortings, two pointers

Pinkie Pie Eats Patty-cakes

constructive algorithms, greedy, math, sortings

Applejack and Storages

constructive algorithms, data structures, greedy, implementation

Omkar and Bed Wars

dp, greedy

Cyclic Permutations

combinatorics, dp, graphs, math

Good String

brute force, dp, greedy, two pointers

Array Walk

brute force, dp, greedy

Uncle Bogdan and Country Happiness

dfs and similar, greedy, math, trees

a-Good String

bitmasks, brute force, divide and conquer, dp, implementation

String Transformation 1

dsu, graphs, greedy, sortings, strings, trees, two pointers

Unmerge

dp

Prefix Flip (Hard Version)

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

Create The Teams

brute force, dp, greedy, implementation, sortings

Universal Solution

greedy

Dubious Cyrpto

binary search, brute force, math, number theory

Acacius and String

brute force, implementation, strings

Element Extermination

constructive algorithms, data structures, greedy

Reading Books (easy version)

data structures, greedy, sortings

Zero Remainder Array

math, sortings, two pointers

Maximum Sum on Even Positions

divide and conquer, dp, greedy, implementation

Omkar and Baseball

constructive algorithms, math

Grid-00100

constructive algorithms, greedy, implementation

Number Game

games, math, number theory

RationalLee

greedy, math, sortings, two pointers

AND, OR and square sum

bitmasks, greedy, math

Even Picture

constructive algorithms

Codeforces Subsequences

brute force, constructive algorithms, greedy, math, strings

Task On The Board

constructive algorithms, greedy, implementation, sortings

Palindromic Paths

greedy, math

Solve The Maze

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

Rotation Matching

constructive algorithms, data structures, greedy, implementation

Ehab and Prefix MEXs

brute force, constructive algorithms, greedy

Game On Leaves

games, trees

Subsequence Hate

implementation, strings

Johnny and Another Rating Drop

bitmasks, greedy, math

Johnny and Contribution

constructive algorithms, graphs, greedy, sortings

Spy-string

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

Mixing Water

binary search, math

Celex Update

math

Game With Array

constructive algorithms, math

Count Triangles

binary search, implementation, math, two pointers

Simple Polygon Embedding

binary search, geometry, math, ternary search

Constructing the Array

constructive algorithms, data structures, sortings

Special Permutation

constructive algorithms

Binary String Reconstruction

constructive algorithms, dfs and similar, math

Special Elements

brute force, implementation, two pointers

Skier

data structures, implementation

Orac and Models

dp, math, number theory

Orac and LCM

data structures, math, number theory

Phoenix and Distribution

constructive algorithms, greedy, sortings, strings

Phoenix and Beauty

constructive algorithms, data structures, greedy, sortings

Magic Tricks

*special problem, dp, graphs

Constructing the Dungeon

*special problem, graphs, greedy

Spring Cleaning

*special problem, greedy, sortings

Boot Camp

*special problem, greedy

Hilbert's Hotel

math, number theory, sortings

Constant Palindrome Sum

brute force, data structures, greedy, two pointers

Yet Another Counting Problem

math, number theory

Nastya and Scoreboard

bitmasks, dp, graphs, greedy

Nastya and Strange Generator

brute force, data structures, greedy, implementation

Edge Weight Assignment

bitmasks, constructive algorithms, dfs and similar, greedy, math, trees

Powered Addition

greedy, math

Xenia and Colorful Gems

binary search, greedy, math, sortings, two pointers

Linova and Kingdom

dfs and similar, dp, greedy, sortings, trees

Three Blocks Palindrome (hard version)

brute force, data structures, dp, two pointers

Three Blocks Palindrome (easy version)

binary search, brute force, data structures, dp, two pointers

Minimum Euler Cycle

constructive algorithms, graphs, greedy, implementation

Circle of Monsters

brute force, constructive algorithms, greedy, math

Eugene and an array

binary search, data structures, implementation, two pointers

Walk on Matrix

bitmasks, constructive algorithms, math

K-Complete Word

dfs and similar, dsu, greedy, implementation, strings

Composite Coloring

brute force, constructive algorithms, greedy, math, number theory

Dreamoon Likes Permutations

implementation, math

Dreamoon Likes Sequences

bitmasks, combinatorics, math

Dreamoon Likes Coloring

constructive algorithms, greedy, implementation, math

Carousel

constructive algorithms, dp, graphs, greedy, math