Subarray Cuts

dp

Constrained Tree

constructive algorithms, data structures

Constrained Tree

dfs and similar

Second price auction

bitmasks, probabilities

Permutations

bitmasks, divide and conquer, math

Permutations

brute force

Fox And Polygon

constructive algorithms, divide and conquer

Fox And Travelling

dp, trees

Fox And Dinner

flows

Fox And Jumping

bitmasks, brute force, dp, math

Fox And Names

dfs and similar, graphs, sortings

Fox And Two Dots

dfs and similar

Progress Monitoring

dp, trees

Pretty Song

math, strings

Restoring Numbers

constructive algorithms, math

Sums of Digits

dp, greedy, implementation

Arthur and Brackets

dp, greedy

Tanya and Password

dfs and similar, graphs

Anya and Ghosts

constructive algorithms, greedy

Breaking Good

dfs and similar, dp, graphs, shortest paths

The Maths Lecture

dp, implementation

Guess Your Way Out!

implementation, math, trees

Amr and Pins

geometry, math

Mr. Kitayuta's Gift

combinatorics, dp, matrices, strings

Mr. Kitayuta's Colorful Graph

brute force, dfs and similar, dsu, graphs

Mr. Kitayuta vs. Bamboos

binary search, greedy

Mr. Kitayuta's Technology

dfs and similar

Mr. Kitayuta, the Treasure Hunter

dfs and similar, dp, two pointers

Mr. Kitayuta's Colorful Graph

dfs and similar, dp, dsu, graphs

Misha and LCP on Tree

binary search, dfs and similar, hashing, string suffix structures, trees

Misha and XOR

bitmasks

Misha and Palindrome Degree

binary search, combinatorics, implementation

Misha and Permutations Summation

data structures

Misha and Forest

constructive algorithms, data structures, greedy, sortings, trees

New Year Running

number theory, trees

New Year Shopping

divide and conquer, dp

New Year Domino

data structures, dp, dsu

New Year Santa Network

combinatorics, dfs and similar, graphs, trees

New Year Book Reading

constructive algorithms, greedy, implementation, math

New Year Permutation

dfs and similar, dsu, graphs, greedy, math, sortings

Stairs and Lines

dp, matrices

Traffic Jams in the Land

data structures, dp, number theory

Array and Operations

flows, graph matchings, number theory

Name That Tune

dp, probabilities, two pointers

Crazy Town

geometry

Subsequences Return

dp, matrices

Gears

brute force, geometry, math

Distributing Parts

greedy, sortings

Tennis Game

binary search

Removing Columns

brute force, constructive algorithms, implementation

Secret Combination

brute force, constructive algorithms, implementation

Modular Equations

math, number theory

Sharti

data structures, games

Birthday

data structures, dfs and similar, dp, trees

Helping People

dp, probabilities

Obsessive String

dp, strings

Treasure

greedy

Vasya and Polynomial

math

Vasya and Chess

constructive algorithms, games, math

Vasya and Basketball

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

Vasya and Wrestling

implementation

Vanya and Field

math

Vanya and Computer Game

binary search, implementation, math, sortings

Vanya and Exams

greedy, sortings

Deciphering

flows, graph matchings

New York Hotel

greedy, math

Treeland Tour

data structures, dfs and similar, dp, trees

Restoring Increasing Sequence

binary search, brute force, greedy, implementation

Chocolate

brute force, dfs and similar, math, meet-in-the-middle, number theory

Hacking Cypher

brute force, math, number theory, strings

Queue

dsu, implementation

Special Matrices

combinatorics, dp

Hiking

binary search, dp

Unbearable Controversy of Being

brute force, combinatorics, dfs and similar, graphs

Given Length and Sum of Digits...

dp, greedy, implementation

Candy Boxes

brute force, constructive algorithms, math

Tourists

data structures, dfs and similar, graphs, trees

Conveyor Belts

data structures

Prefix Product Sequence

constructive algorithms, math, number theory

Strip

binary search, data structures, dp, two pointers

Fight the Monster

binary search, brute force, implementation

LIS of Sequence

data structures, dp, greedy, hashing, math

Valid Sets

dfs and similar, dp, math, trees

Palindrome Transformation

brute force, greedy, implementation

Factory

implementation, math, matrices

Sign on Fence

binary search, constructive algorithms, data structures

Kindergarten

data structures, dp, greedy

Strange Sorting

implementation, math

Maximum Value

binary search, math, sortings, two pointers

Bits

bitmasks, constructive algorithms

Friends and Presents

binary search, math

ELCA

data structures, trees

Random Function and Tree

combinatorics, dp, trees

Game with Strings

bitmasks, dp, probabilities

Interesting Array

constructive algorithms, data structures, trees

Parking Lot

data structures, divide and conquer

Parcels

dp, graphs

Riding in a Lift

combinatorics, dp

Long Jumps

binary search, greedy, implementation

Exams

greedy, sortings