Infinite Game

brute force, combinatorics, dp, games, probabilities

Bear and Chase

brute force, dfs and similar, graphs, implementation, math, probabilities

Clacking Balls

combinatorics, math, probabilities

Plane of Tanks: Duel

brute force, dp, math, probabilities

Roads in E City

interactive, math, probabilities, trees

Bingo!

combinatorics, math, probabilities

Median Queries

constructive algorithms, interactive, probabilities

Ksusha and Square

geometry, math, probabilities, two pointers

Combining Slimes

dp, math, matrices, probabilities

A Trance of Nightfall

dp, geometry, matrices, probabilities

Old Mobile

combinatorics, dp, probabilities

Counting Skyscrapers

dp, math, probabilities

School Clubs

dp, fft, math, number theory, probabilities

Marek and Matching (hard version)

brute force, probabilities

Marek and Matching (easy version)

brute force, probabilities

Alice and the Cactus

dfs and similar, graphs, math, probabilities

Arithmancy (Medium)

constructive algorithms, interactive, probabilities, strings

Colored Jenga

dfs and similar, dp, probabilities

Nezzar and Chocolate Bars

combinatorics, fft, math, probabilities

Darts

geometry, probabilities

Don't Exceed

math, probabilities

Marmots (hard)

math, probabilities

Help King

implementation, probabilities, trees

Fugitive Frenzy

math, probabilities

Centroid Guess

interactive, probabilities, trees

Grove

brute force, dfs and similar, dp, geometry, probabilities

Tokitsukaze and Powers

number theory, probabilities

Astronomy

geometry, probabilities

Nastya and Bees

graphs, interactive, probabilities

Laser Beams

*special problem, geometry, probabilities

Game of Chance

math, probabilities