Farmer John's Favorite Intern

data structures, dp, flows, trees

Olympiad Training

binary search, data structures, dp, flows, geometry, implementation, sortings

Panda Meetups

data structures, dp, flows

Stock Exchange

binary search, flows, graphs

Pisces

data structures, flows, trees

Oleg and chess

data structures, divide and conquer, flows, graph matchings

Making It Bipartite

flows, graph matchings, graphs, number theory

One Billion Shades of Grey

flows, graphs

Breadboard Capacity (easy version)

dp, flows, greedy

Rainbow Triples

binary search, data structures, flows, greedy

Showing Off

flows, graph matchings, greedy, implementation

Starry Night Camping

constructive algorithms, flows, graphs

Growing Trees

binary search, constructive algorithms, flows, graphs, greedy

Four Suits

binary search, bitmasks, flows, greedy

Kingdom Partition

flows

Special Edges

flows, graphs

Chests and Keys

bitmasks, brute force, dfs and similar, dp, flows

New Year and Forgotten Tree

constructive algorithms, flows, graphs

ALT

data structures, flows, graphs, trees

Demonic Invasion

*special problem, flows

Parametric Circulation

binary search, flows

Projectors

flows, graphs

Two Characters, Two Colors

binary search, data structures, dp, flows, greedy

Fishermen

flows, graph matchings, greedy

Cow and Exercise

flows, graphs, shortest paths

Captain America

flows, greedy

Flow Optimality

constructive algorithms, flows, math

Privatization

flows, graphs

Planar Graph

flows, geometry, graphs

Maximum Flow

flows, graphs

Reindeer Games

binary search, constructive algorithms, data structures, divide and conquer, flows, graphs, shortest paths

Gosha is hunting

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

Pills

brute force, flows

Chess Championship

constructive algorithms, flows, greedy, math

Shake It!

combinatorics, dp, flows, graphs

Nanami's Power Plant

flows

Red-Blue Graph

constructive algorithms, flows

Pumping Stations

brute force, dfs and similar, divide and conquer, flows, graphs, greedy, trees

Incorrect Flow

flows

Buying Sets

flows, graph matchings

April Fools' Problem (hard)

binary search, data structures, flows

Goods transportation

dp, flows, greedy

MCF

flows

Scaygerboss

flows

Goblins And Gnomes

brute force, dp, flows, graph matchings

Matching Reduction

brute force, constructive algorithms, dfs and similar, flows, graph matchings, graphs, interactive

Bridge Club

flows, graph matchings, graphs, greedy

Euclid Guess

constructive algorithms, flows, graph matchings, math, number theory

Alice and Recoloring 2

constructive algorithms, flows, graph matchings, greedy

Wine Factory (Hard Version)

data structures, dp, flows, greedy, matrices

Bricks

flows, graph matchings, graphs

k-Maximum Subsequence Sum

data structures, flows, graphs, implementation

The Doctor Meets Vader (Hard)

flows, shortest paths

World Evil

dp, flows

MCMF?

data structures, flows, graphs, greedy, sortings, two pointers

Scaygerboss

flows

Electric Scheme

flows, graph matchings

Yet Another Maxflow Problem

data structures, flows, graphs

Bits of merry old England

flows, graphs

Beautiful League

constructive algorithms, flows, graph matchings

Zoning Restrictions

dp, flows, graphs

Strange Set

flows, math

Dominoes

combinatorics, flows, graph matchings, greedy

Politics

flows, graphs

Heidi and Library (hard)

flows

Yet Another DAG Problem

bitmasks, dfs and similar, dp, flows, graphs, math

Four Melodies

flows, graphs

Button Lock

flows, graph matchings, graphs

Vasya and Endless Credits

dp, flows, graph matchings, graphs, sortings

Two Melodies

dp, flows

Last chance

data structures, flows, graph matchings, graphs, trees

Gang Up

flows, graphs

Madoka and The First Session

constructive algorithms, flows, graph matchings, graphs, implementation

Multiset of Strings

bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees

Minimal k-covering

flows, graphs

Bear and Fair Set

flows, graphs

Double Sort II

dfs and similar, flows, graph matchings, graphs

Anti-Palindromize

flows, graphs, greedy

Rectangle Painting 2

flows, graph matchings, graphs

Summoning Minions

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

Cactusophobia

dfs and similar, flows

Privatization of Roads in Berland

flows, graph matchings, graphs

Students Initiation

binary search, flows, graphs

Underfail

flows

Access Levels

bitmasks, dsu, flows, graph matchings

Allowed Letters

bitmasks, flows, graph matchings, graphs, greedy

Economic Difficulties

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

Machine Programming

flows, graphs

Matrix Problem

flows, graphs

Card Game

binary search, flows, graphs

April Fools' Problem (medium)

binary search, flows, graphs

Binary Tree on Plane

flows, trees

Four Points

brute force, constructive algorithms, flows, geometry, greedy, implementation, math, ternary search

Maximize Mex

flows, graph matchings, graphs

Petya and Graph

flows, graphs

Deciphering

flows, graph matchings

Evacuation

flows, graphs, shortest paths

Road Construction

flows, graphs

Horseback Riding

flows, graphs

Tidying Up

flows, graph matchings