Lovely Matrix

dfs and similar, graphs, greedy, sortings

k-Multiple Free Set

binary search, greedy, sortings

Dima and Two Sequences

combinatorics, math, sortings

Maximum Waterfall

data structures, dp, graphs, sortings

Playlist

math, probabilities, sortings

Squares

greedy, implementation, sortings

Maxim and Discounts

greedy, sortings

Sockets

greedy, implementation, sortings

Cards with Numbers

constructive algorithms, sortings

Printer

binary search, data structures, implementation, sortings

Physics Practical

binary search, dp, sortings, two pointers

Unsorting Array

brute force, sortings

Donkey and Stars

data structures, dp, geometry, math, sortings

Blood Cousins Return

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

Buggy Sorting

constructive algorithms, greedy, sortings

Hydra

graphs, sortings

Big Segment

implementation, sortings

Young Table

implementation, sortings

Reading

sortings

To Add or Not to Add

binary search, sortings, two pointers

Dragons

greedy, sortings

Olympiad

binary search, greedy, sortings, two pointers

Reducing Fractions

implementation, math, number theory, sortings

Little Elephant and Problem

implementation, sortings

Spider's Web

binary search, sortings, two pointers

Transportation

greedy, sortings, two pointers

Photographer

greedy, sortings

Gripping Story

binary search, data structures, sortings

Paint Tree

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

Analyzing Polyline

geometry, math, sortings

Counter Attack

data structures, dsu, graphs, hashing, sortings

Growing Mushrooms

greedy, sortings

Representative Sampling

dp, sortings, strings

Trading Business

greedy, sortings

Geometry Horse

greedy, implementation, sortings, two pointers

Camping Groups

data structures, sortings

Bus

*special problem, implementation, sortings

Chores

sortings

Shoe Store

dp, graph matchings, greedy, sortings, two pointers

Median

greedy, math, sortings

Polygons

geometry, sortings

Rank List

binary search, implementation, sortings

Conveyor

sortings, two pointers

Discounts

constructive algorithms, greedy, sortings

Buses and People

binary search, data structures, sortings

Edges in MST

dfs and similar, dsu, graphs, sortings

Find Pair

implementation, math, sortings

Unlucky Ticket

greedy, sortings

Twins

greedy, sortings

Zebra Tower

*special problem, data structures, greedy, sortings

Matchmaker

*special problem, greedy, sortings

Phone Talks

*special problem, dp, sortings

Trace

geometry, sortings

Combination

greedy, sortings

Double Profiles

graphs, hashing, sortings

Division into Teams

greedy, math, sortings

Business trip

greedy, implementation, sortings

Queue

constructive algorithms, greedy, sortings

Amusing Joke

implementation, sortings, strings

New Year Snowflake

geometry, sortings

New Year Contest

greedy, sortings

Mushroom Gnomes - 2

binary search, data structures, probabilities, sortings

History

sortings

Replacement

greedy, implementation, sortings

Yet Another Task with Queens

sortings

Array sorting

*special problem, sortings

Minimum Sum

divide and conquer, geometry, sortings

Before Exam

constructive algorithms, implementation, sortings

Fancy Number

brute force, greedy, sortings, strings

Lawnmower

greedy, sortings

Lucky Sorting

constructive algorithms, sortings

Datatypes

math, sortings

Item World

brute force, implementation, sortings

Time to Raid Cowavans

brute force, data structures, sortings

Castle

dp, greedy, probabilities, sortings, trees

Help Chef Gerasim

implementation, sortings

Beautiful Road

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

Guard Towers

binary search, dsu, geometry, graphs, sortings

Petya and Tree

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

Doctor

binary search, math, sortings

General Mobilization

data structures, dfs and similar, sortings

Average Score

greedy, math, sortings

Colorful Field

implementation, sortings

Gift

dsu, graphs, sortings, trees

Need For Brake

binary search, greedy, sortings

Lucky Tickets

binary search, data structures, sortings, two pointers

Sort the Table

*special problem, sortings

Table Bowling

*special problem, sortings

Sinking Ship

implementation, sortings, strings

Inquisition

geometry, implementation, sortings

Domino Principle

binary search, data structures, sortings

Physical Education

sortings

Snow sellers

greedy, sortings

Cannon

data structures, geometry, sortings

Event Dates

greedy, meet-in-the-middle, sortings

Moon Craters

dp, sortings

Let's Go Rolling!

dp, sortings

Towers

sortings

Parade

data structures, sortings

Page Numbers

expression parsing, implementation, sortings, strings