Shortest Path Queries

bitmasks, data structures, dsu, graphs

New Year and Three Musketeers

data structures, greedy, sortings

The Boss's Identity

binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings

Delivery Club

binary search, data structures, dp

Dividing Kingdom II

brute force, data structures, dsu, graphs, sortings

Yura and Developers

data structures, divide and conquer

Dancing Lessons

data structures

George and Cards

binary search, data structures

Mushroom Gnomes - 2

binary search, data structures, probabilities, sortings

Inna and Sequence

binary search, data structures, dp, trees

Christmas Game

bitmasks, data structures, dfs and similar, dp, games, math, trees

Anniversary

data structures, implementation, math, matrices, number theory

Diverse Segments

data structures, two pointers

Tree

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

Illusions of the Desert

data structures, trees

Conveyor Belts

data structures

Max Mex

data structures, trees

Strange Array

data structures, greedy, sortings

Vladik and Entertaining Flags

data structures, dsu, graphs

Economic Difficulties

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

Zbazi in Zeydabad

data structures, implementation

Good Graph

data structures, dsu, graphs, trees

Instant Messanger

data structures

Power Sockets

binary search, data structures, greedy

Lena and Queries

data structures, divide and conquer, geometry

Groceries in Meteor Town

binary search, data structures, dsu, trees

Hot is Cold

bitmasks, data structures, divide and conquer, implementation

Balancing Weapons

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

Indecisive Taxi Fee

data structures, graphs, shortest paths

April Fools' Problem (hard)

binary search, data structures, flows

Comfortably Numb

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

Colorful Constructive

constructive algorithms, data structures, greedy

Divan and a Cottage

binary search, data structures

Thwarting Demonstrations

binary search, data structures, trees

Tree Queries

data structures, dfs and similar, graphs, implementation, trees

Split

binary search, data structures, divide and conquer, dsu, math, trees, two pointers

General Mobilization

data structures, dfs and similar, sortings

A Museum Robbery

data structures, dp

String Journey

data structures, dp, string suffix structures

Putting Boxes Together

data structures

The Tree

data structures

Alphabet Permutations

data structures, strings

Board Game

data structures, dfs and similar

Freezing with Style

binary search, data structures, divide and conquer, trees

Serious Business

data structures, divide and conquer, dp, implementation, shortest paths

Keep XOR Low

bitmasks, combinatorics, data structures, divide and conquer, dp, math

Bear and Contribution

data structures, greedy, sortings, two pointers

Phoenix and Memory

data structures, dfs and similar, graphs, greedy

Timetable

constructive algorithms, data structures, greedy, math

Decinc Dividing

brute force, data structures, divide and conquer, dp, greedy

Cup Trick

data structures

Two Permutations

data structures, hashing, strings

Alex and Complicated Task

data structures, dp, greedy

Yuezheng Ling and Dynamic Tree

data structures, trees

Pawns

data structures, divide and conquer, greedy

Hitchhiking in the Baltic States

data structures, dp

Fibonotci

data structures, math, matrices

Strange Addition

data structures, dp, matrices

Friends

binary search, bitmasks, data structures, math

Strange Operation

combinatorics, data structures, dp

Fedor Runs for President

data structures, dp, trees

Autocompletion

data structures, dfs and similar, dp

Nobody is needed

2-sat, data structures, dfs and similar, dp

Misha and Paintings

constructive algorithms, data structures, greedy, implementation, math

Wine Factory (Hard Version)

data structures, dp, flows, greedy, matrices

Leha and security system

data structures

Interesting Sections

data structures, divide and conquer, meet-in-the-middle, two pointers

Music in Car

data structures, greedy, two pointers

More Queries to Array...

data structures, math

Cow Tennis Tournament

combinatorics, data structures, math

Sum of Prefix Sums

data structures, divide and conquer, geometry, trees

Yash And Trees

bitmasks, data structures, dfs and similar, math, number theory

Map

data structures, implementation, sortings

Optimal Sum

data structures, greedy

Traveling in Berland

binary search, data structures, graphs, greedy, implementation

Eels

data structures

Xors on Segments

data structures, strings, trees

Parade

data structures, sortings

Roads and Ramen

data structures, trees

Labyrinth Adventures

data structures, dp, matrices, shortest paths

Chips on a Board

bitmasks, brute force, data structures, dp, games, two pointers

Prince's Problem

brute force, data structures, math, number theory, trees

Two Centroids

data structures, dfs and similar, greedy, trees

Diverging Directions

data structures, dfs and similar, trees

Geometers Anonymous Club

data structures, geometry, math, sortings

Sonya and Bitwise OR

bitmasks, data structures, divide and conquer

Building Forest

data structures, dsu, graphs

Vicky's Delivery Service

data structures, dsu, graphs, hashing

Duff as a Queen

data structures

k-d-sequence

data structures

Petya and Post

data structures, dp

Mashmokh and Water Tanks

binary search, data structures, greedy, trees, two pointers

Queue

data structures

Shave Beaver!

data structures

Tricky and Clever Password

binary search, constructive algorithms, data structures, greedy, hashing, strings

Katya and Segments Sets

data structures, interactive, sortings

Maze 2D

data structures, divide and conquer

Ultimate Weirdness of an Array

data structures, number theory

Bear and Bad Powers of 42

data structures

Interval Cubing

data structures, math