Infinite Chess

implementation, shortest paths

Timofey and a flat tree

data structures, graphs, hashing, shortest paths, trees

Omkar and Pies

bitmasks, dfs and similar, dp, math, shortest paths

Ones

dp, greedy, shortest paths

Snowy Mountain

data structures, dfs and similar, graphs, greedy, shortest paths, trees

Late For Work (submissions are not allowed)

data structures, greedy, schedules, shortest paths

Viruses

*special problem, dp, shortest paths, string suffix structures

Knightmare (easy)

graphs, interactive, shortest paths

The Classic Problem

data structures, graphs, shortest paths

Indecisive Taxi Fee

data structures, graphs, shortest paths

Treeland and Viruses

data structures, dfs and similar, dp, shortest paths, trees

Down Below

binary search, dfs and similar, graphs, greedy, meet-in-the-middle, shortest paths

Appleman and a Game

binary search, shortest paths, strings

Reindeer Games

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

The Game of the Century

constructive algorithms, graphs, shortest paths

Chess

math, shortest paths

Knightmare (hard)

graphs, interactive, shortest paths

Alpha planetary system

constructive algorithms, graphs, shortest paths

Gnomes of Might and Magic

data structures, graphs, implementation, shortest paths

Cow and Exercise

flows, graphs, shortest paths

Four Vertices

constructive algorithms, data structures, graphs, greedy, implementation, shortest paths

Princess and Her Shadow

constructive algorithms, shortest paths

Show Must Go On

binary search, brute force, greedy, shortest paths

Dirty Arkady's Kitchen

data structures, dp, graphs, shortest paths

Teleportation in Byteland

data structures, dfs and similar, divide and conquer, graphs, shortest paths, trees

Oppa Funcan Style Remastered

graphs, math, number theory, shortest paths