Moving to the Capital

dfs and similar, dp, graphs, shortest paths

AB Graph

brute force, constructive algorithms, graphs, greedy, implementation

Paths and Trees

graphs, greedy, shortest paths

Cheap Dinner

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

Gift Set

binary search, greedy, math, ternary search

The Strongest Build

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

Robot Collisions

data structures, greedy, implementation, sortings

Swaps Again

constructive algorithms, implementation, sortings

Binary Median

binary search, bitmasks, brute force, constructive algorithms

Nastia and a Hidden Permutation

constructive algorithms, interactive

Passable Paths (hard version)

data structures, dfs and similar, trees

Subsequences of Length Two

dp, strings

Weakness and Poorness

ternary search

Empty Graph

binary search, constructive algorithms, data structures, greedy, shortest paths

Danil and a Part-time Job

bitmasks, data structures, trees

Orac and Game of Life

dfs and similar, graphs, implementation, shortest paths

Finding Zero

constructive algorithms, interactive, math

Nearest Beautiful Number (hard version)

bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy

Bitwise Queries (Easy Version)

bitmasks, constructive algorithms, interactive, math

Divide by Three

dp, greedy, math, number theory

Trash Problem

data structures, implementation

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

Different Arrays

brute force, dp, implementation

Wish I Knew How to Sort

dp, math, probabilities

Fire

dp, sortings

The Contest

data structures, dp, greedy

Pairs of Segments

data structures, greedy, sortings, two pointers

R2D2 and Droid Army

binary search, data structures, two pointers

Reducing Delivery Cost

brute force, graphs, shortest paths

Pair Of Lines

geometry

Maximize the Remaining String

brute force, data structures, dp, greedy, strings

Cut and Stick

binary search, data structures, greedy, implementation, sortings

Cut

binary search, data structures, dp, graphs, number theory, two pointers

Counting Graphs

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

Array Queries

brute force, data structures, dp

Big Brush

constructive algorithms, data structures, greedy, implementation

Segment Intersections

brute force, greedy, implementation, math

Exact Change

brute force, constructive algorithms, greedy

Reverse

bitmasks, constructive algorithms, dfs and similar, implementation, math, strings

Ehab's Last Corollary

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

Buds Re-hanging

constructive algorithms, dfs and similar, dp, greedy, trees

Magic Gems

dp, math, matrices

Robot in a Hallway

data structures, dp, greedy, implementation, ternary search

Increasing Frequency

binary search, dp, greedy

Number With The Given Amount Of Divisors

brute force, dp, number theory

Zero-One (Hard Version)

dp, greedy

Roman and Numbers

bitmasks, brute force, combinatorics, dp, number theory

The Winter Hike

constructive algorithms, greedy, math

Two Arrays

binary search, brute force, combinatorics, constructive algorithms, dp, two pointers

Garland

dfs and similar, graphs, greedy, trees

Olya and Energy Drinks

data structures, dfs and similar, graphs, shortest paths

Replace With Product

brute force, greedy, math

Masha-forgetful

brute force, constructive algorithms, dp, hashing, implementation, strings

Sequence Sorting

dp, greedy, two pointers

We Need More Bosses

dfs and similar, graphs, trees

Painting the Array II

constructive algorithms, data structures, dp, greedy, implementation

Present

binary search, bitmasks, constructive algorithms, data structures, math, sortings

Shuffle

combinatorics, math, two pointers

Yet Another Division Into Teams

dp, greedy, sortings

Babaei and Birthday Cake

data structures, dp

Hanoi Factory

brute force, data structures, dp, greedy, sortings

Maximum Subarray

data structures, dp, greedy, two pointers

Boring Segments

data structures, sortings, trees, two pointers

Valid Sets

dfs and similar, dp, math, trees

Destroying Roads

constructive algorithms, graphs, shortest paths

Guess The Maximums

binary search, implementation, interactive, math

Placing Jinas

combinatorics, math

Array Partition

binary search, data structures, greedy, two pointers

Balanced Playlist

binary search, data structures, implementation

Martial Arts Tournament

binary search, brute force, greedy, math

Multipliers

math, number theory

Two Sets

2-sat, dfs and similar, dsu, graph matchings, greedy

Rarity and New Dress

dfs and similar, dp, implementation, shortest paths

Time to Run

constructive algorithms, graphs, implementation

Anton and Tree

dfs and similar, dp, trees

Repetitions Decoding

constructive algorithms, implementation, sortings

Segment Tree

data structures, dsu, graphs, trees

Moving Dots

binary search, brute force, combinatorics, math, two pointers

Case of Fugitive

data structures, greedy, sortings

GCD Guess

bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory

Fixed Points

binary search, brute force, dp

Small GCD

bitmasks, brute force, dp, math, number theory

Koxia and Game

constructive algorithms, data structures, dfs and similar, dsu, flows, games, graph matchings, graphs, implementation

Divan and Kostomuksha (easy version)

dp, number theory

Range Sorting (Easy Version)

binary search, dp, dsu, greedy, trees, two pointers

Equation

math

Divisibility by 25

brute force, greedy

Challenges in school №41

brute force, constructive algorithms, games, graphs, greedy, implementation, sortings

Water Balance

data structures, geometry, greedy

Moving Chips

bitmasks, dp, greedy

Watching Fireworks is Fun

data structures, dp, math

Pchelyonok and Segments

binary search, data structures, dp, greedy, math

01 Tree

constructive algorithms, data structures, dsu, greedy, sortings, trees

Height All the Same

combinatorics, constructive algorithms, math, matrices

Edge Split

brute force, constructive algorithms, dfs and similar, dsu, graphs, probabilities, trees

Weight the Tree

constructive algorithms, dfs and similar, dp, implementation, trees

DZY Loves Modification

brute force, data structures, greedy

Guess the Permutation

binary search, combinatorics, interactive, math

Salyg1n and Array (simple version)

constructive algorithms, interactive, math