Permutation recovery

constructive algorithms, data structures, dfs and similar, graphs, greedy, math, sortings

Flawed Flow

constructive algorithms, flows, graphs, greedy

Invariance of Tree

constructive algorithms, dfs and similar, greedy, trees

Vladik and Favorite Game

constructive algorithms, dfs and similar, graphs, interactive

Tesla

constructive algorithms, implementation

Nice table

brute force, constructive algorithms, greedy, math

Below the Diagonal

constructive algorithms, greedy, math

New Roads

constructive algorithms, graphs, trees

Black and White Tree

constructive algorithms, dsu, graphs, greedy, trees

Job Lookup

constructive algorithms, dp, shortest paths, trees

Compartments

combinatorics, constructive algorithms, greedy, implementation

Start of the session

constructive algorithms

Valera and Swaps

constructive algorithms, dsu, graphs, implementation, math, string suffix structures

The table

constructive algorithms, greedy

Kamal-ol-molk's Painting

brute force, constructive algorithms, greedy

Polycarp's Picture Gallery

constructive algorithms, greedy

Broken Monitor

brute force, constructive algorithms, greedy, implementation

Constants in the language of Shakespeare

constructive algorithms, dp, greedy

Exact Neighbours (Medium)

constructive algorithms

Arithmancy (Easy)

brute force, constructive algorithms, interactive, strings

Pixels

constructive algorithms, math

Tree Requests

binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees

Multiples and Power Differences

constructive algorithms, graphs, math, number theory

Powerful Ksenia

bitmasks, constructive algorithms, math

Magic Stones

constructive algorithms, math, sortings

Strange Housing

constructive algorithms, dfs and similar, graph matchings, graphs, greedy

Three Sequences

constructive algorithms, data structures, greedy, math

Make It Increasing

binary search, constructive algorithms, data structures, dp, implementation

Equal Tree Sums

constructive algorithms, dfs and similar, math, trees

Salyg1n and Array (hard version)

constructive algorithms, interactive

Perfect Triples

bitmasks, brute force, constructive algorithms, divide and conquer, math

Kuroni and the Score Distribution

constructive algorithms, greedy, implementation, math

Guess the K-th Zero (Hard version)

binary search, constructive algorithms, data structures, interactive

Paired Payment

binary search, brute force, constructive algorithms, dp, flows, graphs, shortest paths

Sum of Digits

brute force, constructive algorithms, dp, greedy

Prefixes and Suffixes

constructive algorithms, strings, two pointers

New Game Plus!

constructive algorithms, greedy, math

Koa and the Beach (Hard Version)

constructive algorithms, dp, greedy, implementation

K-th Path

brute force, constructive algorithms, shortest paths, sortings

Equal Binary Subsequences

constructive algorithms, geometry, greedy, implementation, strings

Happy Line

constructive algorithms, greedy, sortings

Figure Fixing

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

Kill Anton

brute force, constructive algorithms, data structures, math, strings

In Search of Truth (Easy Version)

constructive algorithms, interactive, math, meet-in-the-middle, probabilities

Count Seconds

brute force, constructive algorithms, dp, graphs, implementation, math

Nezzar and Nice Beatmap

constructive algorithms, geometry, greedy, math, sortings

The minimal unique substring

constructive algorithms, math, strings

Cars

2-sat, constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings

Moment of Bloom

constructive algorithms, dfs and similar, graph matchings, graphs, greedy, trees

Construct the Binary Tree

brute force, constructive algorithms, trees

notepad.exe

binary search, constructive algorithms, greedy, interactive

Tree Queries (Easy Version)

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

Little C Loves 3 II

brute force, constructive algorithms, flows, graph matchings

RPD and Rap Sheet (Hard Version)

brute force, constructive algorithms, interactive, math

One-Way Reform

constructive algorithms, dfs and similar, flows, graphs, greedy

Between

constructive algorithms, dfs and similar, graphs, greedy

Lights

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

Tests for problem D

constructive algorithms, dfs and similar, divide and conquer, trees

K and Medians

constructive algorithms, greedy, math

Hemose on the Tree

bitmasks, constructive algorithms, dfs and similar, trees

DIY Garland

constructive algorithms, greedy, trees

Changing Brackets

constructive algorithms, data structures, dp, greedy

Ice cream coloring

constructive algorithms, dfs and similar, greedy

Square Root of Permutation

combinatorics, constructive algorithms, dfs and similar, graphs, math

Serval and Shift-Shift-Shift

bitmasks, brute force, constructive algorithms, implementation

Little Pony and Summer Sun Celebration

constructive algorithms, dfs and similar, graphs

ace5 and Task Order

constructive algorithms, divide and conquer, implementation, interactive, probabilities, sortings

AND-MEX Walk

bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs

Decypher the String

bitmasks, chinese remainder theorem, constructive algorithms, interactive, math

Searching Rectangles

binary search, constructive algorithms, interactive

Interactive Treasure Hunt

brute force, constructive algorithms, geometry, interactive, math

Brackets in Implications

constructive algorithms, greedy, implementation, math

GCD of Polynomials

constructive algorithms, math

Karen and Test

brute force, combinatorics, constructive algorithms, math

Big Secret

constructive algorithms, math

Dima and Horses

combinatorics, constructive algorithms, graphs

Seating of Students

brute force, constructive algorithms, math

Byteland, Berland and Disputed Cities

constructive algorithms, greedy

Dog Show

constructive algorithms, data structures, greedy

Prairie Partition

binary search, constructive algorithms, greedy, math

Vladik and chat

brute force, constructive algorithms, dp, implementation, strings

Inverse of Rows and Columns

brute force, constructive algorithms

Lucky Number Representation

constructive algorithms, dfs and similar, dp

Evaluate It and Back Again

constructive algorithms, implementation, math

Wrong Floyd

brute force, constructive algorithms, dfs and similar, graphs

Paint Tree

constructive algorithms, divide and conquer, geometry, sortings, trees

Restoring Numbers

constructive algorithms, math

Middle-Out

constructive algorithms, greedy, strings

Three Horses

constructive algorithms, math, number theory

Swaps

constructive algorithms, graphs, greedy

Safe cracking

brute force, constructive algorithms

Fake News (medium)

constructive algorithms, strings

Tetris revisited

constructive algorithms, graph matchings, greedy, math

Two progressions

constructive algorithms, greedy

Tournament-graph

constructive algorithms, graphs

Beautiful Function

constructive algorithms, math

Repairing Of String

*special problem, constructive algorithms

Puzzling Language

constructive algorithms

Suns and Rays

constructive algorithms, dfs and similar, implementation

Xor-MST

bitmasks, constructive algorithms, data structures