The Strongest Build

binary search, brute force, data structures, dfs and similar, graphs, greedy, hashing, implementation

Cheap Dinner

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

GCD Counting

data structures, dfs and similar, dp, number theory, trees

CGCDSSQ

brute force, data structures, math

New Year Concert

binary search, data structures, greedy, math, number theory, two pointers

Omkar and Medians

data structures, greedy, implementation

String Coloring (hard version)

data structures, dp

Pair of Numbers

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

1-Trees and Queries

data structures, dfs and similar, shortest paths, trees

Buy a Ticket

data structures, graphs, shortest paths

Choosing flowers

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

Weights Division (easy version)

data structures, dfs and similar, greedy, trees

Propagating tree

data structures, dfs and similar, trees

Captain Flint and Treasure

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

SUM and REPLACE

brute force, data structures, dsu, number theory

Watto and Mechanism

binary search, data structures, hashing, string suffix structures, strings

XOR on Segment

bitmasks, data structures

Yet Another Yet Another Task

data structures, dp, implementation, two pointers

Sereja and Brackets

data structures, schedules

Собачки и миски

data structures, greedy, sortings

Bug in Code

binary search, data structures, sortings

Shave Beaver!

data structures

Dancing Lessons

data structures

Merge Equal Elements

constructive algorithms, data structures

Comb

data structures, dp

Bug in Code

data structures, graphs, implementation, two pointers

Optical Experiment

binary search, data structures, dp

Old Berland Language

data structures, greedy, trees

Mister B and PR Shifts

data structures, implementation, math

Insertion Sort

data structures, dp, implementation, math

Two Strings

data structures, dp, strings

Rooter's Song

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

Accumulator Apex

data structures, implementation, sortings

Card Game Again

binary search, data structures, number theory, two pointers

Preparing for the Contest

binary search, data structures, greedy, sortings

Teodor is not a liar!

data structures, dp

Subordinates

constructive algorithms, data structures, graphs, greedy, sortings

Shark

brute force, data structures, dsu, trees

Dense Subsequence

data structures, greedy, strings

Connected Components

data structures, dfs and similar, dp, dsu

Felicity is Coming!

data structures, hashing, sortings, strings

Monitor

binary search, data structures

Handshakes

binary search, constructive algorithms, data structures, greedy

Sereja ans Anagrams

binary search, data structures

Spy Syndrome 2

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

Video Cards

brute force, data structures, implementation, math, number theory

Tyler and Strings

combinatorics, data structures, implementation

Unusual Entertainment

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

Credit Card

data structures, dp, greedy, implementation

Expand the Path

brute force, combinatorics, data structures, implementation, math

Let's Play the Words?

data structures, hashing, implementation, math

Bank Hacking

constructive algorithms, data structures, dp, trees

Exposition

binary search, data structures, dsu, trees, two pointers

New Year and Fireworks

brute force, data structures, dfs and similar, dp, implementation

Nezzar and Binary String

data structures, greedy

Generating Sets

binary search, data structures, dfs and similar, greedy, strings, trees

Restructuring Company

data structures, dsu

Music Festival

binary search, data structures, dp, greedy, sortings

Feed Cats

data structures, dp, sortings

Permutation Addicts

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

The Wu

bitmasks, brute force, data structures

Sum of Progression

brute force, data structures, dp, implementation, math

Tufurama

data structures

Kirill and Mushrooms

data structures, sortings

Tree Reconstruction

constructive algorithms, data structures, graphs, greedy

Power Transmission (Hard Edition)

data structures, geometry, implementation, math

Petya and Divisors

binary search, data structures, number theory

Professor Higashikata

data structures, dsu, greedy, implementation, strings

Vasya and a Tree

data structures, trees

Yet Another Sorting Problem

data structures, math

Robot Queries

binary search, data structures, dp, implementation

Li Hua and Tree

brute force, data structures, dfs and similar, dp, implementation, trees

Microcycle

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

Lonely Mountain Dungeons

brute force, data structures, greedy, math, ternary search

Collapsing Strings

data structures, strings, trees

Playlist

data structures, dsu, implementation, shortest paths

Kay and Snowflake

data structures, dfs and similar, dp, trees

Missile Silos

data structures, dfs and similar, graphs, shortest paths

Reverse Sort Sum

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

Copying Data

data structures

White Lines

brute force, data structures, dp, implementation, two pointers

Moving Points

data structures, divide and conquer, implementation, sortings

Arthur and Table

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

Rescheduling the Exam

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

Psychos in a Line

data structures, implementation

Lena and Matrix

data structures, dp, geometry, shortest paths

Same Sum Blocks (Hard)

data structures, greedy

Equalize the Remainders

data structures, greedy, implementation

Restore the Permutation

binary search, constructive algorithms, data structures, greedy, math

Blocking Elements

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

Inconvenient Pairs

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

Survey in Class

brute force, data structures, greedy, implementation, sortings

Vanya and Triangles

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

Imbalanced Array

data structures, divide and conquer, dsu, sortings

Alyona and a tree

binary search, data structures, dfs and similar, graphs, trees

Yet Another Problem

binary search, bitmasks, constructive algorithms, data structures

Progressions Covering

data structures, greedy

Subsequences

data structures, dp

Restore Permutation

binary search, data structures, greedy, implementation

Frog Traveler

data structures, dfs and similar, dp, graphs, shortest paths, two pointers