Paint Tree

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

Choose a Square

binary search, data structures, sortings

Curfew

binary search, brute force, greedy, sortings

Bear and Contribution

data structures, greedy, sortings, two pointers

Runner's Problem

dp, matrices, sortings

Summoning Minions

constructive algorithms, dp, flows, graph matchings, greedy, sortings

Mushroom Gnomes - 2

binary search, data structures, probabilities, sortings

General Mobilization

data structures, dfs and similar, sortings

Berland Elections

greedy, sortings

Minimum Sum

divide and conquer, geometry, sortings

Group Photo 2 (online mirror version)

brute force, greedy, sortings

New Year and Three Musketeers

data structures, greedy, sortings

Fancy Fence

*special problem, data structures, dsu, implementation, math, sortings

Students' Revenge

data structures, greedy, sortings

Median on Segments (General Case Edition)

sortings

Gift

dsu, graphs, sortings, trees

New Year and Castle Construction

combinatorics, geometry, math, sortings

Lovely Matrix

dfs and similar, graphs, greedy, sortings

Oranges and Apples

constructive algorithms, sortings

New Passenger Trams

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

New Year and the Acquaintance Estimation

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

Knights

geometry, graphs, shortest paths, sortings

Hostname Aliases

*special problem, binary search, data structures, implementation, sortings, strings

Playlist

math, probabilities, sortings

Analyzing Polyline

geometry, math, sortings

Rooks and Rectangles

data structures, sortings

Zebra Tower

*special problem, data structures, greedy, sortings

Leaf Sets

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

Expected diameter of a tree

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

Bamboo Partition

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

Before Exam

constructive algorithms, implementation, sortings

Counter Attack

data structures, dsu, graphs, hashing, sortings

80-th Level Archeology

brute force, data structures, greedy, sortings

Flying Sort (Hard Version)

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

Cost Equilibrium

combinatorics, constructive algorithms, math, sortings

Mahmoud and Ehab and the function

binary search, data structures, sortings

Guess Your Way Out! II

data structures, implementation, sortings

Plan of Lectures

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

Hydra

graphs, sortings

Geometry Horse

greedy, implementation, sortings, two pointers

Bus

*special problem, implementation, sortings

Cyclic Shifts Sorting

brute force, constructive algorithms, implementation, sortings

Spider's Web

binary search, sortings, two pointers

Gosha is hunting

brute force, data structures, dp, flows, math, probabilities, sortings

Scalar Queries

combinatorics, data structures, math, sortings

Mice problem

geometry, implementation, math, sortings

Culture Code

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

Network Safety

dfs and similar, dsu, graphs, math, sortings

Event Dates

greedy, meet-in-the-middle, sortings

Yet Another Segments Subset

data structures, dp, graphs, sortings

Trading Business

greedy, sortings

Mastermind

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

Copy or Prefix Sum

combinatorics, data structures, dp, sortings

Two Editorials

brute force, dp, greedy, sortings, two pointers

Oh Sweet Beaverette

data structures, sortings

Destroy it!

dp, implementation, sortings

Travel Cards

greedy, implementation, sortings

Rotate Columns (hard version)

bitmasks, dp, greedy, sortings

Delete a Segment

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

Kingdom and its Cities

dfs and similar, divide and conquer, dp, graphs, sortings, trees

A Heap of Heaps

brute force, data structures, math, sortings

Ball

data structures, sortings

Physical Education

sortings

Permutation recovery

constructive algorithms, data structures, dfs and similar, graphs, greedy, math, sortings

Time to Raid Cowavans

brute force, data structures, sortings

Leaving the Bar

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

Domino Principle

binary search, data structures, sortings

Mittens

constructive algorithms, greedy, sortings

Phone Talks

*special problem, dp, sortings

Ants in Leaves

dfs and similar, greedy, sortings, trees

Topforces Strikes Back

brute force, math, sortings

Earth Wind and Fire

constructive algorithms, greedy, math, sortings, two pointers

Two Houses

brute force, graphs, greedy, interactive, sortings

Average Score

greedy, math, sortings

Stripe 2

binary search, dp, sortings

Count The Rectangles

bitmasks, brute force, data structures, geometry, sortings

Distributing Parts

greedy, sortings

Doctor

binary search, math, sortings

Water Taps

binary search, greedy, sortings

Polygons

geometry, sortings

Edges in MST

dfs and similar, dsu, graphs, sortings

Irrigation

binary search, data structures, implementation, sortings, trees, two pointers

Mike and distribution

constructive algorithms, sortings

Blood Cousins Return

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

Avoid Rainbow Cycles

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

Unsorting Array

brute force, sortings

Sockets

greedy, sortings

Polycarp and Hay

dfs and similar, dsu, graphs, greedy, sortings

Infinite Inversions

binary search, data structures, implementation, sortings, trees

Characteristics of Rectangles

binary search, bitmasks, brute force, implementation, sortings

Sereja and the Arrangement of Numbers

graphs, greedy, sortings

Ordering Pizza

binary search, sortings, ternary search

Rooter's Song

constructive algorithms, data structures, geometry, implementation, sortings, two pointers

Reducing Fractions

implementation, math, number theory, sortings

DeadLee

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

Divide Square

data structures, geometry, implementation, sortings

Yet Another Task with Queens

sortings

K-th Path

brute force, constructive algorithms, shortest paths, sortings

Nezzar and Nice Beatmap

constructive algorithms, geometry, greedy, math, sortings

Pattern Matching

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