80-th Level Archeology

brute force, data structures, greedy, sortings

Lovely Matrix

dfs and similar, graphs, greedy, sortings

Guard Duty (medium)

binary search, dp, greedy, sortings

Students' Revenge

data structures, greedy, sortings

Mushroom Gnomes - 2

binary search, data structures, probabilities, sortings

Paint Tree

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

Lucky Tickets

binary search, data structures, sortings, two pointers

The Doctor Meets Vader (Medium)

flows, graph matchings, graphs, shortest paths, sortings

Ancient Language

graphs, sortings

Petya and Tree

binary search, dfs and similar, probabilities, sortings, trees

Printer

binary search, data structures, implementation, sortings

Cannon

data structures, geometry, sortings

Representative Sampling

dp, sortings, strings

Item World

brute force, implementation, sortings

A Simple Task

data structures, sortings, strings

Sonya and Problem Wihtout a Legend

dp, sortings

Physical Education Lessons

data structures, implementation, sortings

Nearest vectors

geometry, sortings

Team Building

bitmasks, dp, greedy, sortings

Double Profiles

graphs, hashing, sortings

Returning Home

graphs, shortest paths, sortings

Dogeforces

constructive algorithms, data structures, dfs and similar, divide and conquer, dsu, greedy, sortings, trees

Edges in MST

dfs and similar, dsu, graphs, sortings

Asterism (Hard Version)

binary search, combinatorics, dp, math, number theory, sortings

Pattern Matching

bitmasks, data structures, dfs and similar, graphs, hashing, sortings, strings

Binary Spiders

bitmasks, data structures, implementation, math, sortings, trees

Optimal Insertion

data structures, divide and conquer, dp, greedy, sortings

Excellent Arrays

binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers

Colors and Intervals

constructive algorithms, data structures, greedy, sortings

Number of Groups

data structures, dfs and similar, dsu, graphs, greedy, sortings

Leaving the Bar

brute force, data structures, geometry, greedy, math, sortings

New School

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

Delete a Segment

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

Earth Wind and Fire

constructive algorithms, greedy, math, sortings, two pointers

PermutationForces II

brute force, combinatorics, greedy, sortings, trees, two pointers

Yet Another Segments Subset

data structures, dp, graphs, sortings

Culture Code

binary search, combinatorics, data structures, dp, shortest paths, sortings

Infinite Card Game

binary search, brute force, data structures, dfs and similar, dp, dsu, games, graphs, greedy, sortings, two pointers

Scalar Queries

combinatorics, data structures, math, sortings

Cost Equilibrium

combinatorics, constructive algorithms, math, sortings

Three Chairs

bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings

Exotic Queries

data structures, implementation, sortings

Mice problem

geometry, implementation, math, sortings

Bamboo Partition

brute force, data structures, implementation, math, number theory, sortings, two pointers

Guess Your Way Out! II

data structures, implementation, sortings

New Passenger Trams

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

Beautiful Road

dfs and similar, dp, dsu, graphs, implementation, sortings, trees

Curfew

binary search, brute force, greedy, sortings

Wilbur and Trees

dp, math, probabilities, sortings

Castle

dp, greedy, probabilities, sortings, trees

Transportation

greedy, sortings, two pointers

Inquisition

geometry, implementation, sortings

Array sorting

*special problem, sortings

Table Bowling

*special problem, sortings

Blood Cousins Return

binary search, data structures, dfs and similar, dp, sortings

Subarray Sorting

data structures, sortings

Divide Square

data structures, geometry, implementation, sortings

DeadLee

data structures, dfs and similar, greedy, implementation, sortings

Ball

data structures, sortings

Avoid Rainbow Cycles

data structures, dsu, graphs, greedy, sortings, trees

Copy or Prefix Sum

combinatorics, data structures, dp, sortings

Mike and distribution

constructive algorithms, sortings

Anya's Simultaneous Exhibition

constructive algorithms, graphs, greedy, interactive, sortings

Hyperregular Bracket Strings

combinatorics, greedy, hashing, math, number theory, sortings

Walk the Runway

bitmasks, brute force, data structures, dp, graphs, implementation, sortings

Spanning Tree Queries

binary search, data structures, dfs and similar, dsu, graphs, greedy, math, sortings, trees

Flying Sort (Hard Version)

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

Plan of Lectures

constructive algorithms, dfs and similar, dsu, graphs, implementation, sortings, trees

Red-Blue Matrix

brute force, constructive algorithms, implementation, sortings

Purple Crayon

data structures, dfs and similar, games, graphs, greedy, math, sortings, trees

DFS Trees

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

I Wanna be the Team Leader

bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers

Cyclic Shifts Sorting

brute force, constructive algorithms, implementation, sortings

Leaf Sets

data structures, dfs and similar, dsu, graphs, greedy, sortings, trees

Median on Segments (General Case Edition)

sortings

Doremy's Number Line

dp, greedy, sortings

Rooks and Rectangles

data structures, sortings

Pokémon Arena

data structures, graphs, greedy, implementation, shortest paths, sortings

Array Equalizer

binary search, greedy, implementation, math, number theory, sortings, two pointers

New Year and the Acquaintance Estimation

binary search, data structures, graphs, greedy, implementation, math, sortings

Choose a Square

binary search, data structures, sortings

Morse Code

binary search, data structures, dp, hashing, sortings, string suffix structures, strings

New Year and Three Musketeers

data structures, greedy, sortings

Bear and Contribution

data structures, greedy, sortings, two pointers

Katya and Segments Sets

data structures, interactive, sortings

Four Divisors

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

Buses and People

binary search, data structures, sortings

Renovation

constructive algorithms, greedy, sortings

Place Your Ad Here

data structures, sortings

Gripping Story

binary search, data structures, sortings

The Potion of Great Power

*special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers

Looking for Owls

binary search, data structures, geometry, hashing, sortings

Sort the Table

*special problem, sortings

Inversion SwapSort

constructive algorithms, greedy, sortings

Rotate Columns (hard version)

bitmasks, dp, greedy, sortings

Two Editorials

brute force, dp, greedy, sortings, two pointers

Mastermind

constructive algorithms, graph matchings, greedy, implementation, sortings, two pointers

Oranges and Apples

constructive algorithms, sortings

Sanae and Giant Robot

binary search, brute force, data structures, dsu, greedy, sortings

Expected diameter of a tree

binary search, brute force, dfs and similar, dp, sortings, trees