Deciphering

flows, graph matchings

Nanami's Power Plant

flows

Cactusophobia

dfs and similar, flows

Chests and Keys

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

Showing Off

flows, graph matchings, greedy, implementation

Matching Reduction

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

Shake It!

combinatorics, dp, flows, graphs

Oleg and chess

data structures, divide and conquer, flows, graph matchings

Rainbow Triples

binary search, data structures, flows, greedy

Breadboard Capacity (easy version)

dp, flows, greedy

Special Edges

flows, graphs

Last chance

data structures, flows, graph matchings, graphs, trees

Goblins And Gnomes

brute force, dp, flows, graph matchings

Scaygerboss

flows

Reindeer Games

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

Electric Scheme

flows, graph matchings

Scaygerboss

flows

MCMF?

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

Maximum Flow

flows, graphs

One Billion Shades of Grey

flows, graphs

MCF

flows

World Evil

dp, flows

Stock Exchange

binary search, flows, graphs

Training Camp

flows, graphs

Planar Graph

flows, geometry, graphs

Privatization

flows, graphs

Kingdom Partition

flows

Chess Championship

constructive algorithms, flows, greedy, math

Two Characters, Two Colors

binary search, data structures, dp, flows, greedy

The Doctor Meets Vader (Hard)

flows, shortest paths

Projectors

flows, graphs

Four Suits

binary search, bitmasks, flows, greedy

Pisces

data structures, flows, trees

Panda Meetups

data structures, dp, flows

Parametric Circulation

binary search, flows

Olympiad Training

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

Pills

brute force, flows

Flow Optimality

constructive algorithms, flows, math

Conference

data structures, flows

Farmer John's Favorite Intern

data structures, dp, flows, trees

Excursions

*special problem, constructive algorithms, dfs and similar, flows, graph matchings, graphs

Growing Trees

binary search, constructive algorithms, flows, graphs, greedy

Demonic Invasion

*special problem, flows