Lemper Cooking Competition

data structures

Encoding

hashing, string suffix structures, strings

Sleep in Class

constructive algorithms, data structures, math, two pointers

New Year and Three Musketeers

data structures, greedy, sortings

Subsequences Galore

bitmasks, combinatorics, dp

Quarrel

graphs, shortest paths

Minimum Modular

brute force, graphs, math, number theory

Anniversary

data structures, implementation, math, matrices, number theory

Zublicanes and Mumocrates

dp, trees, two pointers

Economic Difficulties

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

One-X

combinatorics, dfs and similar, dp, math, trees

Hot is Cold

bitmasks, data structures, divide and conquer, implementation

Numbers

dp, math, number theory

Apprentice Learning Trajectory

Gotta Go Fast

binary search, dp

Comfortably Numb

bitmasks, data structures, divide and conquer, strings, trees

The Supersonic Rocket

geometry, hashing, strings

PolandBall and White-Red graph

constructive algorithms, graphs, shortest paths

Elevator

dp, graphs, shortest paths

Complete Mirror

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

Two Tanks

binary search, dp, implementation, math

Traveling Graph

bitmasks, graph matchings, graphs

Bear and Contribution

data structures, greedy, sortings, two pointers

Anti-Theft Road Planning

bitmasks, constructive algorithms, divide and conquer, greedy, interactive, math

Square Table

constructive algorithms, math, probabilities

Allowed Letters

bitmasks, flows, graph matchings, graphs, greedy

Labelling Cities

dfs and similar, graphs, hashing

Tickets

combinatorics, math, probabilities

Vus the Cossack and a Graph

dfs and similar, graphs, greedy, implementation

Logical Expression

bitmasks, dp, shortest paths

Liar

binary search, dp, hashing, string suffix structures

Prefix Sums

binary search, brute force, combinatorics, math, matrices

Bubble Cup hypothesis

bitmasks, constructive algorithms, dp, math

Superior Periodic Subarrays

number theory

Palindrome XOR

dfs and similar, graphs

BerDonalds

graphs, math, shortest paths

Trails and Glades

constructive algorithms, dsu, graphs, greedy

Mighty Rock Tower

brute force, combinatorics, dp, math, probabilities

Vicky's Delivery Service

data structures, dsu, graphs, hashing

Tanks

dp, greedy, implementation

Lost Root

interactive, probabilities

Polo the Penguin and Trees

combinatorics, dfs and similar, trees

Katya and Segments Sets

data structures, interactive, sortings

Valera and Number

bitmasks, dp, math, probabilities

Delicious Dessert

binary search, dsu, hashing, math, number theory, string suffix structures

Access Levels

bitmasks, dsu, flows, graph matchings

Cinema

brute force, data structures

Lucky Arrays

data structures

Michael and Charging Stations

binary search, dp, greedy

Lihmuf Balling

binary search, brute force, math

Magical Permutation

bitmasks, brute force, constructive algorithms, data structures, graphs, math

Abracadabra

divide and conquer

Greg and Caves

combinatorics, dp

Inversions problem

dp, probabilities

Forming Groups

Finals in arithmetic

constructive algorithms, implementation, math

Underfail

flows

Exam Cheating

binary search, dp

Divisibility

constructive algorithms, dp, greedy, number theory

Sereja and Sets

bitmasks, dfs and similar

Refactoring

greedy, implementation, strings

Geometrical Progression

brute force, math, number theory

Students Initiation

binary search, flows, graphs

Minegraphed

constructive algorithms, graphs

Kuro and Topological Parity

dp

Don't fear, DravDe is kind

binary search, data structures, dp, hashing

Fire in the City

binary search, data structures

Four Divisors

data structures, dp, math, number theory, sortings, two pointers

Buses and People

binary search, data structures, sortings

Startup Funding

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

Two permutations

data structures

Project Manager

brute force, data structures, implementation

Mausoleum

dp

Renovation

constructive algorithms, greedy, sortings

Cube Problem

brute force, math, number theory

Privatization of Roads in Berland

flows, graph matchings, graphs

Fibonacci String Subsequences

combinatorics, dp, matrices

Sereja and Tree

graphs, implementation

PE Lesson

dp, math

Eleventh Birthday

combinatorics, dp, math

Tree Quiz

Place Your Ad Here

data structures, sortings

Cows and Cool Sequences

dp, math, number theory

Collective Mindsets (hard)

Hamming Distance

constructive algorithms, greedy, math, matrices

Daleks' Invasion (hard)

data structures, dsu, graphs, trees

Space Isaac

hashing, number theory

Good Substrings

string suffix structures

New Year Presents

constructive algorithms, data structures

Chips Puzzle

constructive algorithms, implementation, math

Ratings and Reality Shows

data structures, two pointers

Berkomnadzor

data structures, greedy

Two Arrays

binary search, games, graph matchings

Neatness

constructive algorithms, dfs and similar

Game with Strings

bitmasks, dp, games

Game

games, implementation

Simplified Nonogram

bitmasks, dp, hashing, meet-in-the-middle

Gambling Nim

bitmasks, math, matrices, probabilities

Constrained Tree

dfs and similar

Pokermon League challenge

math, probabilities