Dreamoon Likes Strings

constructive algorithms, data structures

Drazil Likes Heap

data structures, greedy, implementation, sortings

No Monotone Triples

data structures

AND Segments

bitmasks, combinatorics, data structures, dp, two pointers

Bombs

data structures, two pointers

Pair of Topics

binary search, data structures, sortings, two pointers

Frog Jumps

binary search, data structures, dfs and similar, greedy, implementation

Autocompletion

data structures, dfs and similar, dp

Median Mountain Range

data structures

Present

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

Battalion Strength

data structures, divide and conquer, probabilities

Reachable Strings

data structures, hashing, strings

Treeland and Viruses

data structures, dfs and similar, dp, shortest paths, trees

World of Darkraft: Battle for Azathoth

brute force, data structures, sortings

Journey Planning

data structures, dp, greedy, math, sortings

Falling Blocks

*special problem, data structures

Movie Fan

*special problem, data structures, greedy, implementation, sortings

Moving Points

data structures, divide and conquer, implementation, sortings

Recommendations

data structures, greedy, sortings

Concatenation with intersection

data structures, hashing, strings, two pointers

Skyscrapers (hard version)

data structures, dp, greedy

Skyscrapers (easy version)

brute force, data structures, dp, greedy

Cow and Fields

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

Animal Observation (hard version)

data structures, dp, greedy

Animal Observation (easy version)

data structures, dp

1-Trees and Queries

data structures, dfs and similar, shortest paths, trees

Nanosoft

binary search, data structures, dp, implementation

Sum of Prefix Sums

data structures, divide and conquer, geometry, trees

Water Balance

data structures, geometry, greedy

String Coloring (hard version)

data structures, dp

Yet Another Walking Robot

data structures, implementation

Segment tree or Fenwick?

data structures

Cartesian Tree

data structures

Irreducible Anagrams

binary search, constructive algorithms, data structures, strings, two pointers

Mind Control

brute force, data structures, implementation

Permutation Separation

data structures, divide and conquer

MEX maximizing

data structures, greedy, implementation, math

NEKO's Maze Game

data structures, dsu, implementation

Messenger Simulator

data structures

Delete a Segment

brute force, constructive algorithms, data structures, dp, graphs, sortings, trees, two pointers

Hyperset

brute force, data structures, implementation

Fedya the Potter Strikes Back

data structures, strings

LCC

data structures, math, matrices, probabilities

Numbers on Tree

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

New Year and Social Network

data structures, graph matchings, graphs, math, trees

New Year and Conference

binary search, data structures, hashing, sortings

New Year and Ascent Sequence

binary search, combinatorics, data structures, dp, implementation, sortings

Number of Components

data structures

Friends and Gifts

constructive algorithms, data structures, math

Stack of Presents

data structures, implementation

The Cake Is a Lie

constructive algorithms, data structures, dfs and similar, graphs

K Integers

binary search, data structures

Segment Tree

data structures, dsu, graphs, trees

Berry Jam

data structures, dp, greedy, implementation

Spaceship Solitaire

data structures, greedy, implementation

Decreasing Debts

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

Portals

data structures, dp, greedy, implementation, sortings

Beautiful Rectangle

brute force, combinatorics, constructive algorithms, data structures, greedy, math

Let's Play the Words?

data structures, hashing, implementation, math

Beautiful Mirrors

data structures, dp, math, probabilities

Beautiful Numbers

data structures, implementation, math, two pointers

Beautiful Mirrors with queries

data structures, probabilities

Economic Difficulties

data structures, dfs and similar, dp, flows, graphs, trees

Editor

data structures, implementation

Colored Tree

data structures, trees

Optimal Subsequences (Hard Version)

data structures, greedy

Optimal Subsequences (Easy Version)

data structures, greedy

Tree Queries

data structures, probabilities, trees

Antenna Coverage

data structures, dp, greedy, sortings

The Contest

data structures, dp, greedy

Yet Another Monster Killing Problem

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

Trip to Saint Petersburg

data structures

Voting (Hard Version)

binary search, data structures, greedy

Voting (Easy Version)

data structures, dp, greedy

Addition Robot

data structures, math, matrices

Performance Review

data structures

Find String in a Grid

data structures, dp, strings, trees

Even Path

data structures, implementation

Too Many Segments (hard version)

data structures, greedy, sortings

Queue in the Train

data structures, greedy, implementation

Alice and the Unfair Game

binary search, data structures, dp, dsu

Alice and the Doll

brute force, data structures, greedy, implementation

Balanced Distribution

data structures, dp, greedy

Balanced Playlist

binary search, data structures, implementation

Balanced Tunnel

data structures, sortings, two pointers

Adilbek and the Watering System

data structures, greedy, sortings

Stack Exterminable Arrays

data structures, divide and conquer, dp, hashing

Distinct Characters Queries

data structures

Social Network (hard version)

data structures, implementation

Wi-Fi

data structures, dp, greedy

Choose a Square

binary search, data structures, sortings

Gardener Alex

binary search, data structures

Workout plan

data structures, greedy

Guarding warehouses

data structures, geometry

Moving Walkways

data structures, greedy, math

Into Blocks (hard version)

data structures

Into Blocks (easy version)

data structures, dsu, greedy, implementation, two pointers

Koala and Notebook

data structures, dfs and similar, graphs, shortest paths, strings, trees

Forced Online Queries Problem

data structures, divide and conquer, dsu, graphs, trees

Sum Queries?

data structures, greedy, implementation, math