Python Indentation

dp

New Year and Boolean Bridges

New Year and Original Order

dp, math

New Year and Rainbow Roads

graphs, greedy, implementation

New Year and Entity Enumeration

bitmasks, combinatorics, dp, math

New Year and Arbitrary Arrangement

dp, math, probabilities

Reverses

dp, string suffix structures, strings

Power Tower

chinese remainder theorem, math, number theory

Party

bitmasks, brute force, dp, graphs

Seating of Students

brute force, constructive algorithms, math

Shockers

implementation, strings

Yet Another Maxflow Problem

data structures, flows, graphs

Clear The Matrix

bitmasks, dp

Swapping Characters

brute force, hashing, implementation, strings

Almost Difference

data structures, math

Cyclic Cipher

fft, math

Weighting a Tree

constructive algorithms, dfs and similar, graphs

Bipartite Segments

binary search, data structures, dfs and similar, dsu, graphs, two pointers

GCD of Polynomials

constructive algorithms, math

Maximum Questions

data structures, dp, strings

Unusual Sequences

bitmasks, combinatorics, dp, math, number theory

Remove Extra One

brute force, data structures, math

Letters Removing

data structures, strings

Segments Removal

data structures, dsu, flows, implementation, two pointers

Shovel Sale

constructive algorithms, math

Restoring the Expression

brute force, hashing, math

Squares and not squares

constructive algorithms, greedy

Alarm Clock

greedy

Welcome home, Chtholly

data structures, dsu

Nephren Runs a Cinema

chinese remainder theorem, combinatorics, math, number theory

Willem, Chtholly and Seniorious

data structures, probabilities

Ithea Plays With Chtholly

binary search, constructive algorithms, games, greedy, interactive

Nephren gives a riddle

binary search, dfs and similar

Eyes Closed

data structures, probabilities

String Mark

combinatorics, math, strings

Square Subsets

bitmasks, combinatorics, dp, math

XK Segments

binary search, math, sortings, two pointers

Ralph and Mushrooms

dp, graphs

Ralph And His Tour in Binary Country

brute force, data structures, trees

Marco and GCD Sequence

constructive algorithms, math

Ralph And His Magic Field

combinatorics, constructive algorithms, math, number theory

Subtree Minimum Query

data structures, trees

Counting Arrays

combinatorics, dp, math, number theory

Credit Card

data structures, dp, greedy, implementation

Lust

combinatorics, math, matrices

Sloth

dfs and similar, dp, graph matchings, trees

Envy

data structures, dsu, graphs

Gluttony

constructive algorithms, greedy

Mod Mod Mod

binary search, dp, math

Xor-MST

bitmasks, constructive algorithms, data structures

Connecting Vertices

dp, graphs

Maximum Subsequence

bitmasks, divide and conquer, meet-in-the-middle

Almost Identity Permutations

combinatorics, dp, math

Row of Models

greedy, sortings

Little Brother

binary search, geometry, sortings

Ratings and Reality Shows

data structures, two pointers

Symmetric Projections

geometry

Maximum Element

combinatorics, dp, math

Restoration of string

constructive algorithms, graphs, implementation

Anti-Palindromize

flows, graphs, greedy

Binary Matrix

dsu

Boxes And Balls

data structures, greedy

Berland.Taxi

data structures

Road Widening

constructive algorithms, greedy, implementation

Renovation

constructive algorithms, greedy, sortings

Photo Processing

binary search, dp

Palindromic Cut

brute force, implementation, strings

Orientation of Edges

dfs and similar, graphs

Packmen Strike Back

binary search, dp, math

Downloading B++

binary search, implementation

Berland Army

constructive algorithms, graphs, greedy

Automatic Door

implementation

Numbers on the blackboard

combinatorics, dp

Magic Breeding

bitmasks

Tournament

data structures, graphs

Teams Formation

data structures, implementation

Short Program

bitmasks, constructive algorithms

Ann and Books

data structures, flows, hashing

Danil and a Part-time Job

bitmasks, data structures, trees

Olya and Energy Drinks

data structures, dfs and similar, graphs, shortest paths

Slava and tanks

constructive algorithms

Royal Questions

dsu, graphs, greedy

Delivery Club

binary search, data structures, dp

High Cry

binary search, bitmasks, combinatorics, data structures, divide and conquer

National Property

2-sat, dfs and similar, graphs, implementation

Forbidden Indices

dsu, string suffix structures, strings

Awards For Contestants

brute force, data structures, dp

Merge Sort

constructive algorithms, divide and conquer

Strange Game On Matrix

greedy, two pointers

Restore the Tree

graphs, greedy, trees

Paths

data structures, number theory

Points, Lines and Ready-made Titles

dfs and similar, dsu, graphs, trees

Something with XOR Queries

brute force, interactive, probabilities

The Untended Antiquity

data structures, hashing

The Overdosing Ubiquity

brute force, dfs and similar, graphs

The Intriguing Obsession

combinatorics, dp, math

El Toll Caves

math

Yet Another Minimization Problem

divide and conquer, dp

Policeman and a Tree

dp, graphs, trees

Huge Strings

bitmasks, brute force, dp, implementation, strings