Swapping Problem

brute force, constructive algorithms, data structures, sortings

Short Task

brute force, dp, math, number theory

Education

brute force, dp, greedy, implementation

Permutation by Sum

brute force, greedy, math

Spy Detected!

brute force, implementation

Chips on a Board

bitmasks, brute force, data structures, dp, games, two pointers

Chainword

brute force, data structures, dp, matrices, string suffix structures, strings

Min Cost String

brute force, constructive algorithms, graphs, greedy, strings

Yet Another Card Deck

brute force, data structures, implementation, trees

King's Task

brute force, graphs, implementation

Optimal Encoding

brute force, data structures

Tree Calendar

brute force, constructive algorithms, dfs and similar, sortings

Complete the MST

bitmasks, brute force, data structures, dfs and similar, dsu, graphs, greedy, trees

Maximize the Remaining String

brute force, data structures, dp, greedy, strings

Double-ended Strings

brute force, implementation, strings

Matrix Sorting

bitmasks, brute force, constructive algorithms, greedy, two pointers

Two chandeliers

binary search, brute force, chinese remainder theorem, math, number theory

Going Home

brute force, hashing, implementation, math

Minimum Grid Path

brute force, data structures, greedy, math

Binary Removals

brute force, dp, greedy, implementation

Two Houses

brute force, graphs, greedy, interactive, sortings

Planar Reflections

brute force, data structures, dp

GCD Sum

brute force, math

Meximization

brute force, data structures, greedy, sortings

Split it!

brute force, constructive algorithms, greedy, strings

Qingshan and Daniel

brute force, data structures, greedy, implementation

Delete The Edges

brute force, constructive algorithms, dfs and similar, graphs, implementation

Berland Crossword

bitmasks, brute force, greedy, implementation

ABC String

bitmasks, brute force, implementation

GCD of an Array

brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers

K-beautiful Strings

binary search, brute force, constructive algorithms, greedy, strings

Planet Lapituletti

brute force, implementation

Almost Fault-Tolerant Database

brute force, constructive algorithms, dfs and similar, greedy, implementation

Ruler Of The Zoo

brute force, data structures

Fib-tree

brute force, dfs and similar, divide and conquer, number theory, trees

Pekora and Trampoline

brute force, data structures, dp, greedy, implementation

Minimal Cost

brute force, math

K-th Largest Value

brute force, greedy, implementation

Sum of Cubes

binary search, brute force, brute force, math

Balanced Remainders

brute force, constructive algorithms, math

Two Policemen

*special problem, binary search, brute force, math

Cheap Dinner

brute force, data structures, graphs, greedy, implementation, sortings, two pointers

Pythagorean Triples

binary search, brute force, math, number theory

Minimum Ties

brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation, math

Paired Payment

binary search, brute force, constructive algorithms, dp, flows, graphs, shortest paths

Floor and Mod

binary search, brute force, math, number theory

Add and Divide

brute force, greedy, math, number theory

Basic Diplomacy

brute force, constructive algorithms, greedy, implementation

AB Graph

brute force, constructive algorithms, graphs, greedy, implementation

Fence Painting

brute force, constructive algorithms, greedy

New Colony

brute force, greedy, implementation

Odd Mineral Resource

binary search, bitmasks, brute force, data structures, probabilities, trees

Nezzar and Lucky Number

brute force, dp, greedy, math

Nezzar and Colorful Balls

brute force, greedy

Inflation

binary search, brute force, greedy, math

Unusual Matrix

2-sat, brute force, constructive algorithms

New Year's Number

brute force, dp, math

Array Destruction

brute force, constructive algorithms, data structures, greedy, implementation, sortings

String LCM

brute force, math, number theory, strings

New Year's Puzzle

brute force, dp, graph matchings, greedy, sortings

Strange List

brute force, greedy, implementation, math

Strange Shuffle

binary search, brute force, constructive algorithms, interactive

A Bit Similar

bitmasks, brute force, hashing, string suffix structures, strings, two pointers

Ceil Divisions

brute force, constructive algorithms, math, number theory

The Robot

brute force, implementation

Hills And Valleys

brute force, implementation

Apollo versus Pan

bitmasks, brute force, math

Bovine Dilemma

brute force, geometry, math

Unique Number

brute force, greedy, math

Water Level

brute force, graphs, greedy, implementation, math

Divide and Summarize

binary search, brute force, data structures, divide and conquer, implementation, sortings

Find the Spruce

brute force, dp, implementation

Four Points

brute force, constructive algorithms, flows, geometry, greedy, implementation, math, ternary search

Checkpoints

brute force, constructive algorithms, greedy, math, probabilities

Two Editorials

brute force, dp, greedy, sortings, two pointers

Balls of Steel

brute force, geometry, greedy

Finding the Vertex

brute force, dfs and similar, dp, interactive, trees

Division

brute force, math, number theory

Long Permutation

brute force, math, two pointers

Yurii Can Do Everything

binary search, bitmasks, brute force, constructive algorithms, divide and conquer, two pointers

Marketing Scheme

brute force, constructive algorithms, greedy, math

Reducing Delivery Cost

brute force, graphs, shortest paths

Rogue-like Game

*special problem, brute force, greedy, two pointers

Number of Apartments

brute force, constructive algorithms, math

ABBB

brute force, data structures, greedy, strings

Rock, Paper, Scissors

brute force, constructive algorithms, flows, greedy, math

Swedish Heroes

brute force, dp, implementation

Hexagons

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

Sage's Birthday (hard version)

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

Stairs

brute force, constructive algorithms, greedy, implementation, math

XOR-gun

bitmasks, brute force, constructive algorithms

Bouncing Ball

brute force, dp, implementation

Repainting Street

brute force, brute force, greedy

Prison Break

brute force, math

Perform Easily

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

Grime Zoo

brute force, greedy, implementation, strings

Fair Numbers

brute force, number theory

Yet Another Array Restoration

brute force, math, number theory

Minimum Product

brute force, greedy, math

Searchlights

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