Saitama Destroys Hotel

implementation, math

Pastoral Oddities

data structures, divide and conquer, dsu, math, trees

Ruminations on Ruminants

geometry, math

Lieges of Legendre

games, math

Moodular Arithmetic

combinatorics, dfs and similar, dsu, math, number theory

Alternative Thinking

dp, greedy, math

Kleofáš and the n-thlon

dp, math, probabilities

Lipshitz Sequence

data structures, math

Spongebob and Squares

brute force, math

Tricky Sum

math

Divisibility

math

Wilbur and Trees

dp, math, probabilities, sortings

Pasha and Phone

binary search, math

Happy Tree Party

data structures, dfs and similar, graphs, math, trees

Beautiful Function

constructive algorithms, math

The Big Race

math

The Monster and the Squirrel

math

Wizards' Duel

implementation, math

Chip 'n Dale Rescue Rangers

binary search, geometry, math

Duff in Love

math

Present for Vitalik the Philatelist

combinatorics, math, number theory

Anton and Ira

constructive algorithms, greedy, math

Dima and Lisa

brute force, math, number theory

Olesya and Rodion

math

Number of Binominal Coefficients

dp, math, number theory

Three Logos

bitmasks, brute force, constructive algorithms, geometry, implementation, math

Developing Skills

implementation, math, sortings

Luxurious Houses

implementation, math

Vasya the Hipster

implementation, math

A Problem about Polyline

geometry, math

Vasya and Petya's Game

math, number theory

Bots

combinatorics, dp, math, number theory

Fibonotci

data structures, math, matrices

Bear and Blocks

binary search, data structures, dp, math

Bear and Poker

implementation, math, number theory

Geometric Progressions

math

Lengthening Sticks

combinatorics, implementation, math

Simple Game

constructive algorithms, games, greedy, implementation, math

Inventory

greedy, math

Music

implementation, math

Sign Posts

brute force, geometry, math

Symmetric and Transitive

combinatorics, dp, math

Primes or Palindromes?

brute force, implementation, math, number theory

Clique in the Divisibility Graph

dp, math, number theory

Gerald and Giant Chess

combinatorics, dp, math, number theory

Gerald's Hexagon

brute force, geometry, math

Amr and Chemistry

brute force, graphs, greedy, math, shortest paths

Vitaly and Cycle

combinatorics, dfs and similar, graphs, math

Arthur and Table

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

Pasha and Tea

constructive algorithms, implementation, math, sortings

Ilya and Diplomas

greedy, implementation, math

Case of a Top Secret

binary search, implementation, math

Kyoya and Photobooks

brute force, math, strings

Kyoya and Train

dp, fft, graphs, math, probabilities

Kyoya and Permutation

binary search, combinatorics, constructive algorithms, greedy, implementation, math

Kyoya and Colored Balls

combinatorics, dp, math

Vanya and Triangles

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

Vanya and Scales

brute force, dp, greedy, math, meet-in-the-middle, number theory

Vanya and Books

implementation, math

Vanya and Table

implementation, math

GukiZ and Binary Operations

combinatorics, implementation, math, matrices, number theory

Brackets in Implications

constructive algorithms, greedy, implementation, math

Divisibility by Eight

brute force, dp, math

Degenerate Matrix

binary search, math

Sasha Circle

geometry, math

Mike and Foam

bitmasks, combinatorics, dp, math, number theory

Mike and Frog

brute force, greedy, implementation, math

Soldier and Traveling

flows, graphs, math

Soldier and Number Game

constructive algorithms, dp, math, number theory

Soldier and Bananas

brute force, implementation, math

Superhero's Job

dfs and similar, dp, hashing, math, number theory

Idempotent functions

constructive algorithms, graphs, math

Berserk Robot

constructive algorithms, math, sortings

A Heap of Heaps

brute force, data structures, math, sortings

Demiurges Play Again

dfs and similar, dp, math, trees

Tourist's Notes

binary search, brute force, greedy, implementation, math

Tavas and Pashmaks

geometry, math

Tavas and Karafs

binary search, greedy, math

Polycarpus' Dice

math

Covered Path

dp, greedy, math

Exam

constructive algorithms, implementation, math

Board Game

games, greedy, implementation, math

Playing with Paper

implementation, math

Om Nom and Candies

brute force, greedy, math

Anya and Cubes

binary search, bitmasks, brute force, dp, math, meet-in-the-middle

Ilya and Sticks

greedy, math, sortings

Pasha and String

constructive algorithms, greedy, math, strings

Pluses everywhere

combinatorics, dp, math, number theory

DNA Alignment

math, strings

Two Buttons

dfs and similar, graphs, greedy, implementation, math, shortest paths

A and B and Team Training

greedy, implementation, math, number theory

Arthur and Questions

greedy, implementation, math, ternary search

Ilya and Escalator

combinatorics, dp, math, probabilities

Drazil and His Happy Friends

math, number theory

Drazil and Factorial

greedy, math, sortings

Drazil and Date

math

Han Solo and Lazer Gun

brute force, data structures, geometry, implementation, math

Permutations

bitmasks, divide and conquer, math

Game

constructive algorithms, math

Fox And Jumping

bitmasks, brute force, dp, math