Unstable String

binary search, dp, greedy, implementation, strings, two pointers

Array Reodering

brute force, greedy, math, number theory, sortings

Falling Sand (Hard Version)

dfs and similar, dp, graphs, greedy

Falling Sand (Easy Version)

dfs and similar, graphs, greedy

Lost Array

graphs, greedy, interactive, shortest paths

Histogram Ugliness

greedy, implementation, math

Binary String Partition

*special problem, binary search, greedy

Chess Team Forming

*special problem, binary search, data structures, greedy

Minimax

constructive algorithms, greedy, strings

Secret Santa

constructive algorithms, flows, graphs, greedy, math

Pursuit

binary search, brute force, greedy, sortings

Binary Decimal

greedy, math

Sifid and Strange Subsequences

greedy, math, sortings

Eshag Loves Big Arrays

constructive algorithms, greedy, math

Trees of Tranquillity

data structures, dfs and similar, greedy, trees

Parsa's Humongous Tree

dfs and similar, divide and conquer, dp, greedy, trees

Potions (Hard Version)

data structures, greedy

Potions (Easy Version)

brute force, data structures, dp, greedy

Armchairs

dp, flows, graph matchings, greedy

Robot Collisions

data structures, greedy, implementation, sortings

Permutation Sort

constructive algorithms, greedy

Compression and Expansion

brute force, data structures, greedy, implementation, trees

Nastia and a Beautiful Matrix

binary search, constructive algorithms, dp, greedy

Nastia Plays with a Tree

constructive algorithms, data structures, dfs and similar, dp, dsu, greedy, implementation, trees

To Go Or Not To Go?

brute force, dfs and similar, graphs, greedy, implementation, shortest paths

Arranging The Sheep

greedy, math

Berland Regional

brute force, data structures, greedy, number theory, sortings

Fillomino 2

constructive algorithms, dfs and similar, greedy, implementation

Morning Jogging

constructive algorithms, greedy, sortings

Sum of 2050

greedy, math

AGAGA XOOORRR

bitmasks, brute force, dp, greedy

Tit for Tat

greedy

Phoenix and Earthquake

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

Phoenix and Socks

greedy, sortings, two pointers

Phoenix and Towers

constructive algorithms, data structures, greedy

Phoenix and Gold

constructive algorithms, greedy, math

Cut and Stick

binary search, data structures, greedy, implementation, sortings

Product 1 Modulo N

greedy, number theory

GCD and MST

constructive algorithms, dsu, graphs, greedy, number theory, sortings

Education

brute force, dp, greedy, implementation

Permutation by Sum

brute force, greedy, math

Corrupted Array

constructive algorithms, data structures, greedy

Colorings and Dominoes

combinatorics, dp, greedy, math

Min Cost String

brute force, constructive algorithms, graphs, greedy, strings

Review Site

greedy

Is It Rated?

greedy, interactive, math, probabilities

The Sports Festival

dp, greedy

TMT Document

greedy

Complete the MST

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

Binary Literature

constructive algorithms, greedy, implementation, strings, two pointers

Maximize the Remaining String

brute force, data structures, dp, greedy, strings

Epic Transformation

constructive algorithms, data structures, greedy

Partial Replacement

greedy, implementation

Cakewalk

*special problem, greedy, implementation, shortest paths

Flip the Bits

constructive algorithms, greedy, implementation, math

Flip the Cards

2-sat, constructive algorithms, data structures, greedy, sortings, two pointers

Travelling Salesman Problem

binary search, data structures, dp, greedy, shortest paths, sortings, two pointers

Balance the Bits

constructive algorithms, greedy

Matrix Sorting

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

Minimum Grid Path

brute force, data structures, greedy, math

Binary Removals

brute force, dp, greedy, implementation

Two Houses

brute force, graphs, greedy, interactive, sortings

Box Fitting

binary search, bitmasks, data structures, greedy

Square-Free Division (hard version)

data structures, dp, greedy, math, number theory, two pointers

Square-Free Division (easy version)

data structures, dp, greedy, math, number theory, two pointers

M-arrays

constructive algorithms, greedy, 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

Let's Go Hiking

games, greedy

Diamond Miner

geometry, greedy, math, sortings

Dogeforces

constructive algorithms, data structures, dfs and similar, divide and conquer, dsu, greedy, sortings, trees

1D Sokoban

binary search, dp, greedy, implementation, two pointers

Berland Crossword

bitmasks, brute force, greedy, implementation

Enormous XOR

bitmasks, constructive algorithms, greedy, math, strings, two pointers

K-beautiful Strings

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

Anti-knapsack

constructive algorithms, greedy

Almost Fault-Tolerant Database

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

Genius's Gambit

bitmasks, constructive algorithms, greedy, math

Maximum width

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

Card Deck

data structures, greedy, math

Zookeeper and The Infinite Zoo

bitmasks, constructive algorithms, dp, greedy, math

Pekora and Trampoline

brute force, data structures, dp, greedy, implementation

K-th Largest Value

brute force, greedy, implementation

Equalize the Array

binary search, data structures, greedy, math, sortings

Accidental Victory

binary search, data structures, greedy

Dense Array

greedy, math

Painting Numbers

*special problem, data structures, greedy, number theory

Problemsolving Marathon

*special problem, binary search, greedy

RBS Deletion

*special problem, greedy

Ones

dp, greedy, shortest paths

Cheap Dinner

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

Minimum Ties

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

Shifting Stacks

greedy, implementation

Move and Swap

dfs and similar, dp, greedy, trees

Add and Divide

brute force, greedy, math, number theory

Basic Diplomacy

brute force, constructive algorithms, greedy, implementation

AB Tree

dp, greedy, trees

Sorting Books

data structures, dp, greedy

AB Graph

brute force, constructive algorithms, graphs, greedy, implementation