Queue

constructive algorithms, greedy, sortings

New Year Contest

greedy, sortings

Ray Tracing

greedy, hashing, implementation, math, number theory, sortings

Reducing Fractions

implementation, math, number theory, sortings

Unsorting Array

brute force, sortings

Doctor

binary search, math, sortings

Mittens

constructive algorithms, greedy, sortings

Travel Cards

greedy, implementation, sortings

Fancy Fence

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

Longest Regular Bracket Sequence

constructive algorithms, data structures, dp, greedy, sortings, strings

Replace by MEX

brute force, constructive algorithms, sortings

0-1 MST

dfs and similar, dsu, graphs, sortings

Strange Beauty

dp, math, number theory, sortings

Divide and Sum

combinatorics, math, sortings

Cow and Fields

binary search, data structures, dfs and similar, graphs, greedy, shortest paths, sortings

Multiple Testcases

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

Array Splitting

greedy, sortings

Salary Changing

binary search, greedy, sortings

Perform Easily

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

Difference Array

brute force, data structures, implementation, sortings

Permutation Restoration

binary search, data structures, greedy, math, sortings, two pointers

Pashmak and Graph

dp, sortings

Asterism (Easy Version)

binary search, brute force, combinatorics, math, number theory, sortings

Dances (Hard Version)

binary search, greedy, sortings, two pointers

Teleporters (Hard Version)

binary search, greedy, sortings

Paths on the Tree

dfs and similar, dp, greedy, sortings, trees

Imbalanced Array

data structures, divide and conquer, dsu, sortings

Strange Device

constructive algorithms, interactive, math, sortings

Vanya and Triangles

brute force, combinatorics, data structures, geometry, math, sortings

Survey in Class

brute force, data structures, greedy, implementation, sortings

Inconvenient Pairs

binary search, data structures, implementation, sortings, two pointers

Lorry

greedy, sortings

Balanced Removals (Harder)

binary search, constructive algorithms, divide and conquer, greedy, implementation, sortings

Rescheduling the Exam

binary search, data structures, greedy, implementation, math, sortings

Arthur and Table

brute force, data structures, dp, greedy, math, sortings

Moving Points

data structures, divide and conquer, implementation, sortings

Microcycle

data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees

A Game with Traps

binary search, dp, greedy, sortings

The Butcher

geometry, greedy, implementation, sortings, two pointers

Kirill and Mushrooms

data structures, sortings

Johnny and Grandmaster

greedy, implementation, math, sortings

Feed Cats

data structures, dp, sortings

Music Festival

binary search, data structures, dp, greedy, sortings

The Child and Zoo

dsu, sortings

Unusual Entertainment

data structures, dfs and similar, dsu, shortest paths, sortings, trees, two pointers

Train Hard, Win Easy

constructive algorithms, greedy, math, sortings

Segments

greedy, sortings

Spy Syndrome 2

data structures, dp, hashing, implementation, sortings, string suffix structures, strings

Fancy Number

brute force, greedy, sortings, strings

Cunning Gena

bitmasks, dp, greedy, sortings

Felicity is Coming!

data structures, hashing, sortings, strings

Skills

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

Two Heaps

combinatorics, constructive algorithms, greedy, implementation, math, sortings

Subordinates

constructive algorithms, data structures, graphs, greedy, sortings

Olympiad

binary search, greedy, sortings, two pointers

The Art of Dealing with ATM

binary search, sortings

Preparing for the Contest

binary search, data structures, greedy, sortings

Accumulator Apex

data structures, implementation, sortings

Rooter's Song

constructive algorithms, data structures, geometry, implementation, sortings, two pointers

Ordering Pizza

binary search, sortings, ternary search

Event Dates

greedy, meet-in-the-middle, sortings

Phone Talks

*special problem, dp, sortings

Before Exam

constructive algorithms, implementation, sortings

Analyzing Polyline

geometry, math, sortings

Minimum Sum

divide and conquer, geometry, sortings

Group Photo 2 (online mirror version)

brute force, greedy, sortings

Bug in Code

binary search, data structures, sortings

Собачки и миски

data structures, greedy, sortings

Match Points

binary search, greedy, sortings, ternary search, two pointers

Choosing flowers

binary search, brute force, data structures, dfs and similar, dp, greedy, sortings, two pointers

GCD and MST

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

Minimizing Difference

binary search, constructive algorithms, greedy, sortings, ternary search, two pointers

For Gamers. By Gamers.

binary search, brute force, greedy, math, sortings

Cheap Dinner

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

Robot Collisions

data structures, greedy, implementation, sortings

XOR Inverse

bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees

Searchlights

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

Fire

dp, sortings

Pairs of Segments

data structures, greedy, sortings, two pointers

Cut and Stick

binary search, data structures, greedy, implementation, sortings

Counting Graphs

combinatorics, divide and conquer, dsu, graphs, greedy, sortings, trees

Yet Another Division Into Teams

dp, greedy, sortings

Hanoi Factory

brute force, data structures, dp, greedy, sortings

Repetitions Decoding

constructive algorithms, implementation, sortings

Case of Fugitive

data structures, greedy, sortings

Matching vs Independent Set

constructive algorithms, graphs, greedy, sortings

Count the Trains

binary search, data structures, greedy, sortings

Linguistics

greedy, implementation, sortings, strings

Triangular Paths

constructive algorithms, graphs, math, shortest paths, sortings

Pillars

binary search, data structures, dp, sortings, trees

Fox and Card Game

games, greedy, sortings

Equalizing Two Strings

constructive algorithms, sortings, strings

Doremy's Drying Plan (Easy Version)

brute force, data structures, dp, greedy, sortings

Turn Off The TV

data structures, sortings

Vlad and the Mountains

binary search, data structures, dsu, graphs, implementation, sortings, trees, two pointers

World of Darkraft: Battle for Azathoth

brute force, data structures, sortings

Rotate Columns (easy version)

bitmasks, brute force, dp, greedy, sortings

The Great Equalizer

binary search, data structures, math, sortings

Minimization

dp, greedy, sortings

Petya and Construction Set

constructive algorithms, graphs, math, sortings, trees