Blocked Points

math

Fox and Number Game

greedy, math

Fox and Perfect Sets

math

Fox and Minimal path

bitmasks, constructive algorithms, graphs, implementation, math

Bear in the Field

math, matrices

Bear and Prime Numbers

binary search, brute force, data structures, dp, implementation, math, number theory

Bear and Strings

brute force, greedy, implementation, math, strings

Number Busters

binary search, math

Sereja and Cinema

combinatorics, math

Lever

implementation, math

Red and Black Tree

dp, implementation, math

Divisible by Seven

math, number theory

Making Sequences is Fun

binary search, implementation, math

Watching Fireworks is Fun

data structures, dp, math

Subway Innovation

greedy, math, two pointers

Fox Dividing Cheese

math, number theory

K-Periodic Array

greedy, implementation, math

Rook, Bishop and King

graphs, math, shortest paths

Valera and Contest

constructive algorithms, implementation, math

Dima and Magic Guitar

brute force, implementation, math

Ghd

brute force, math, probabilities

Insertion Sort

data structures, dp, implementation, math

Two Semiknights Meet

greedy, math

Levko and Permutation

constructive algorithms, math, number theory

Pair of Numbers

binary search, brute force, data structures, math, two pointers

Prime Number

math, number theory

Permutation

constructive algorithms, dp, math

Xenia and Hamming

implementation, math

Vasya and Robot

brute force, greedy, math

Find Maximum

implementation, math, number theory

Two Heaps

combinatorics, constructive algorithms, greedy, implementation, math, sortings

Domino

implementation, math

Jeff and Digits

brute force, implementation, math

Jeff and Rounding

dp, greedy, implementation, math

Mafia

binary search, math, sortings

Fixed Points

brute force, implementation, math

Doodle Jump

math, number theory

Number Transformation II

greedy, math

Alice and Bob

games, math, number theory

Simple Molecules

brute force, graphs, math

Rational Resistance

math, number theory

Iahub and Permutations

combinatorics, math

Tourist Problem

combinatorics, implementation, math

The Wall

math

GCD Table

chinese remainder theorem, math, number theory

Quiz

binary search, greedy, math, matrices, number theory

Routine Problem

greedy, math, number theory

Vasily the Bear and Beautiful Strings

combinatorics, math, number theory

Vasily the Bear and Fly

math

Vasily the Bear and Triangle

implementation, math

Counting Skyscrapers

dp, math, probabilities

Theft of Blueprints

graphs, math

Evil

math

Magic Five

combinatorics, math

Hungry Sequence

math

Stadium and Games

binary search, math

Ciel and Flowers

combinatorics, math

Ciel and Flipboard

dp, greedy, math

Ciel and Robot

binary search, implementation, math

Malek Dance Club

combinatorics, math

Even Odds

math

Summer Homework

data structures, math

Summer Homework

data structures, math

PE Lesson

dp, math

Special Task

math

Archer

math, probabilities

Interval Cubing

data structures, math

Morning run

binary search, math, two pointers

Olya and Graph

combinatorics, math

Continued Fractions

brute force, implementation, math

Pythagorean Theorem II

brute force, math

Random Ranking

dp, math, probabilities

Rotatable Number

math, number theory

Minimum Modular

brute force, graphs, math, number theory

Rectangle Puzzle II

implementation, math

Lucky Permutation Triple

constructive algorithms, implementation, math

Empire Strikes Back

binary search, math, number theory

Yaroslav and Permutations

greedy, math

Shaass and Oskols

implementation, math

Ksusha and Square

geometry, math, probabilities, two pointers

Cube Problem

brute force, math, number theory

Polo the Penguin and Lucky Numbers

dp, implementation, math

Polo the Penguin and XOR operation

implementation, math

Pipeline

binary search, math

Ladies' Shop

constructive algorithms, fft, math

Lucky Permutation

constructive algorithms, math

Positions in Permutations

combinatorics, dp, math

Cows and Primitive Roots

implementation, math, number theory

Cow Tennis Tournament

combinatorics, data structures, math

Cows and Cool Sequences

dp, math, number theory

XOR and OR

constructive algorithms, implementation, math

Painting Eggs

greedy, math

Sequence Transformation

brute force, data structures, dp, implementation, math

Game on Tree

implementation, math, probabilities, trees

Little Girl and Maximum XOR

bitmasks, dp, greedy, implementation, math

Dima and Two Sequences

combinatorics, math, sortings

Dima and Sequence

implementation, math

Dima and Friends

implementation, math

Three Horses

constructive algorithms, math, number theory

Prime Matrix

binary search, brute force, math, number theory