Plane of Tanks: Duel

brute force, dp, math, probabilities

Problem About Equation

math

Rock-Paper-Scissors

implementation, math

Wizards and Demonstration

implementation, math

Wizards and Bets

dfs and similar, graphs, math, matrices

Wizards and Numbers

games, math

Wizards and Huge Prize

dp, math, probabilities

Wizards and Trolleybuses

implementation, math

Tetrahedron

dp, math, matrices

Median

greedy, math, sortings

Another Problem on Strings

binary search, brute force, dp, math, strings, two pointers

Find Pair

implementation, math, sortings

Flatland Fencing

games, math

Colliders

math, number theory

Soft Drinking

implementation, math

Smart Cheater

data structures, math, probabilities

Quantity of Strings

combinatorics, dfs and similar, graphs, math

Win or Freeze

games, math, number theory

Division into Teams

greedy, math, sortings

Bag of mice

dp, games, math, probabilities

Escape

implementation, math

Insomnia cure

constructive algorithms, implementation, math

Lucky Subsequence

combinatorics, dp, math

Help Vasilisa the Wise 2

brute force, math

Help Farmer

brute force, math

Hopscotch

geometry, math

New Year Table

geometry, math

Wallpaper

implementation, math

Ternary Logic

implementation, math

Rectangle and Square

brute force, geometry, math

Pairs of Numbers

brute force, dfs and similar, math, number theory

The World is a Theatre

combinatorics, math

Opposites Attract

implementation, math

Birthday

geometry, math

Fibonacci Sums

dp, math

Hot Bath

binary search, brute force, math

Measuring Lengths in Baden

math

The number of positions

math

Squares

math

Put Knight!

games, math

Winnie-the-Pooh and honey

implementation, math

Elevator

brute force, implementation, math

Not Quick Transformation

divide and conquer, math

Elevator

implementation, math

Plumber

math

Cifera

math

Sleeping

combinatorics, implementation, math

Museum

math, matrices, probabilities

Double Happiness

brute force, math, number theory

Petya and Square

implementation, math

Lucky Interval

brute force, math

Datatypes

math, sortings

Basketball Team

combinatorics, dp, math, probabilities

Testing Pants for Sadness

greedy, implementation, math

Vectors

implementation, math

Interval Coloring

*special problem, greedy, math

Rotation

*special problem, geometry, math

Lamps in a Line

*special problem, math

Help Shrek and Donkey

dp, games, math, probabilities

Winning Strategy

binary search, graphs, math, shortest paths

Horse Races

dp, math

Friends

graphs, implementation, math

Lostborn

dp, math, number theory

Flags

dp, math, matrices

Chips

implementation, math

Cableway

greedy, math

Interesting Game

dp, games, math

Trains

implementation, math

Long sequence

brute force, math, matrices

Powerful array

data structures, implementation, math, two pointers

Tetris revisited

constructive algorithms, graph matchings, greedy, math

Reflection

math

Toy Army

math, number theory

Numbers

dp, math, number theory

Doctor

binary search, math, sortings

Magical Array

math

Double Cola

implementation, math

Average Score

greedy, math, sortings

Depression

geometry, math

Security System

math

Archer's Shot

binary search, geometry, math, two pointers

Falling Anvils

math, probabilities

Points

implementation, math

Plus and xor

dp, greedy, math

Mutation

bitmasks, dp, math

Big Maximum Sum

data structures, dp, greedy, implementation, math, trees

Morrowindows

math, number theory

The Elder Trolls IV: Oblivon

greedy, math

Oil

*special problem, greedy, math

Extraordinarily Nice Numbers

*special problem, math

Goshtasp, Vishtasp and Eidi

*special problem, greedy, math

Round Table Knights

dp, math, number theory

Progress Bar

implementation, math

Cookies

math

Young Physicist

implementation, math

Half-decay tree

data structures, divide and conquer, dp, math, probabilities

Petya and His Friends

constructive algorithms, math, number theory

Harry Potter and Three Spells

implementation, math

Prime Segment

*special problem, brute force, math, number theory

Table

*special problem, greedy, implementation, math