Good Triple

brute force, two pointers

GukiZ hates Boxes

binary search, greedy

Fish Weight

constructive algorithms, greedy

Shifts

brute force, two pointers

High Load

constructive algorithms, greedy, implementation, trees

The Butcher

geometry, greedy, implementation, sortings, two pointers

GCD on a grid

brute force, dfs and similar, dp, implementation, math, number theory

Three Logos

bitmasks, brute force, constructive algorithms, geometry, implementation, math

Two Tables

brute force, implementation

The Monster

dp, greedy, implementation, math

Square

math

XK Segments

binary search, math, sortings, two pointers

Money Transfers

constructive algorithms, data structures, greedy, sortings

Yet Another Minimization Problem

divide and conquer, dp

Cashback

data structures, dp, greedy, math

New Problem

brute force, strings

Reberland Linguistics

dp, implementation, strings

Ilya And The Tree

dfs and similar, graphs, math, number theory, trees

Decreasing Debts

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

Tokitsukaze and Two Colorful Tapes

constructive algorithms, dfs and similar, graphs, greedy

Matching vs Independent Set

constructive algorithms, graphs, greedy, sortings

Bus Number

brute force, combinatorics, math

Feed Cats

data structures, dp, sortings

The Beatles

brute force, math

Chess

brute force, implementation, math

Xor Tree

binary search, bitmasks, data structures, divide and conquer, dp, trees

Feed with Candy

greedy

Johnny and Grandmaster

greedy, implementation, math, sortings

Multicolored Cars

data structures, implementation

Longest Subsequence

brute force, math, number theory

Lazy Student

constructive algorithms, data structures, graphs

Puzzles

dfs and similar, math, probabilities, trees

Find Pair

implementation, math, sortings

Glass Half Spilled

dp

A Growing Tree

data structures, dfs and similar, trees

Three Sequences

constructive algorithms, data structures, greedy, math

Sasha and Array

data structures, math, matrices

Phoenix and Computers

combinatorics, dp, math

Unshuffling a Deck

constructive algorithms, implementation

DZY Loves Physics

greedy, math

Numerical Sequence (easy version)

binary search, brute force, math

A Student's Dream

greedy, math

Stairs and Elevators

binary search

Amity Assessment

brute force, constructive algorithms, implementation

Sausage Maximization

bitmasks, data structures, trees

Mike's Sequence

*special problem, divide and conquer, implementation, math

Strip

binary search, data structures, dp, two pointers

Earn or Unlock

bitmasks, brute force, dp

Counting Factorizations

combinatorics, divide and conquer, dp, math, number theory

Let's Play Osu!

dp, math, probabilities

The Wu

bitmasks, brute force, data structures

Arena

combinatorics, dp, math

Lucky Common Subsequence

dp, strings

Quiz League

implementation

Flea travel

implementation, math

Nephren gives a riddle

binary search, dfs and similar

Login Verification

*special problem, strings

Kaavi and Magic Spell

dp, strings

Messenger Simulator

data structures

Mishka and Interesting sum

data structures

Mischievous Mess Makers

greedy, math

Monocarp and the Set

combinatorics, data structures, math

Make It Increasing

binary search, constructive algorithms, data structures, dp, implementation

Permutation Addicts

constructive algorithms, data structures, dfs and similar, dsu, graphs, trees

Beautiful Mirrors

data structures, dp, math, probabilities

Accounting

brute force, math

Two Chess Pieces

dfs and similar, dp, greedy, trees

Complete the Projects (easy version)

greedy

Maximum Control (easy)

implementation

Minimum Path

graphs, shortest paths

Image Preview

binary search, brute force, dp, two pointers

Mahmoud and Ehab and the xor-MST

bitmasks, dp, graphs, implementation, math

Travel Card

binary search, dp

Once Again...

constructive algorithms, dp, matrices

Array and Operations

flows, graph matchings, number theory

Recovering BST

brute force, dp, math, number theory, trees

Predict Outcome of the Game

brute force, implementation, math

Union of Doubly Linked Lists

implementation

Epidemic in Monstropolis

constructive algorithms, dp, greedy, two pointers

Equal Tree Sums

constructive algorithms, dfs and similar, math, trees

Non-Palindromic Substring

hashing, implementation, math, strings

GCD Queries

constructive algorithms, interactive, number theory

Bottle Arrangements

constructive algorithms

Basketball Team

combinatorics, dp, math, probabilities

Laboratory Work

implementation, math

Almost Acyclic Graph

dfs and similar, graphs

Constructing Tests

binary search, brute force, constructive algorithms

Mahmoud and a Dictionary

data structures, dfs and similar, dp, dsu, graphs

Counting Arrays

combinatorics, dp, math, number theory

Power Transmission (Easy Edition)

brute force, geometry

Game on Axis

combinatorics, dfs and similar, dsu, graphs, implementation

Jongmah

dp

Game of the Rows

brute force, greedy, implementation

Pencils and Boxes

binary search, data structures, dp, greedy, two pointers

Rebus

constructive algorithms, expression parsing, greedy, math

Road to Post Office

math

Looking for Order

bitmasks, dp

Count the Trains

binary search, data structures, greedy, sortings

Regular Bridge

constructive algorithms, graphs, implementation

Devu and Flowers

bitmasks, combinatorics, number theory