Yet Another Dividing into Teams

math

Grow The Tree

greedy, math, sortings

Integer Points

geometry, math

Good ol' Numbers Coloring

math, number theory

Running in Pairs

constructive algorithms, greedy, math

The Football Season

brute force, math, number theory

Pens and Pencils

math

Number Discovery

math

Tile Painting

constructive algorithms, math, number theory

Ivan the Fool and the Probability Theory

combinatorics, dp, math

Standard Free2play

dp, greedy, math

Prime Subtraction

math, number theory

Balanced Binary Search Trees

dp, math

Balanced Rating Changes

implementation, math

Alice and the Cactus

dfs and similar, graphs, math, probabilities

Alice and the List of Presents

combinatorics, math

Stones

brute force, greedy, math

Special Permutations

math

Equalize Prices Again

math

Another Filling the Grid

combinatorics, dp, math

Primes and Multiplication

math, number theory

Filling the Grid

implementation, math

Wrong Answer on test 233 (Hard Version)

combinatorics, math

Math Problem

math

Power Products

hashing, math, number theory

p-binary

bitmasks, brute force, math

Forgetting Things

math

Wooden Raft

binary search, math, number theory

CME

math

Perfect Team

binary search, math

2048 Game

brute force, greedy, math

Alex and Julian

bitmasks, math, number theory

Multiplication Table

math, number theory

Sum Queries?

data structures, greedy, implementation, math

Zmei Gorynich

greedy, math

Creating a Character

binary search, math

Numerical Sequence (hard version)

binary search, math

Numerical Sequence (easy version)

binary search, brute force, math

Swords

math

White Sheet

geometry, math

Ticket Game

games, greedy, math

Yellow Cards

greedy, implementation, math

Petya and Construction Set

constructive algorithms, graphs, math, sortings, trees

Badges

brute force, math

Optimal Currency Exchange

brute force, math

Equalizing by Division (hard version)

brute force, math, sortings

Book Reading

math

Chips Moving

math

King's Path

*special problem, math, trees

Teams

*special problem, binary search, greedy, math

Wojtek and Card Tricks

math

Kamil and Making a Stream

math, number theory, trees

Moving Walkways

data structures, greedy, math

Koala and Lights

implementation, math, number theory

Paint the Numbers

greedy, implementation, math

Polygons

greedy, math, number theory

XORinacci

math

XOR Guessing

bitmasks, interactive, math

There Are Two Types Of Burgers

brute force, greedy, implementation, math

Choose Two Numbers

math, sortings

Beauty of a Permutation

constructive algorithms, math

Almost Equal

constructive algorithms, greedy, math

Natasha, Sasha and the Prefix Sums

combinatorics, dp, math, number theory

Kirk and a Binary String (hard version)

data structures, greedy, math, strings

Mislove Has Lost an Array

greedy, math

BowWow and the Timetable

math

Common Divisors

implementation, math

Equal Rectangles

greedy, math

You Are Given Some Letters...

binary search, implementation, math

Print a 1337-string...

combinatorics, constructive algorithms, math, strings

You Are Given a WASD-string...

brute force, data structures, dp, greedy, implementation, math, strings

Maximum Median

binary search, greedy, math, sortings

Zero Array

greedy, math

Graph Traveler

brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory

Round Corridor

math, number theory

Water Lily

geometry, math

Yet Another Subarray Problem

dp, greedy, math

DIY Wooden Ladder

greedy, math, sortings

Odd Sum Segments

constructive algorithms, math

Three Piles of Candies

brute force, constructive algorithms, math

Geometers Anonymous Club

data structures, geometry, math, sortings

Submarine in the Rybinsk Sea (hard edition)

combinatorics, math, number theory

Submarine in the Rybinsk Sea (easy edition)

combinatorics, math, number theory

Sport Mafia

binary search, brute force, math

Drinks Choosing

greedy, math

1-2-K Game

games, math

Remove a Progression

math

Amusement Park

*special problem, dp, math

Candies!

data structures, dp, implementation, math

Number Circle

greedy, math, sortings

Count Pairs

math, matrices, number theory, two pointers

Expected Square Beauty

dp, math, probabilities

Stickers and Toys

math

Vus the Cossack and a Field

divide and conquer, implementation, math

Vus the Cossack and Numbers

constructive algorithms, greedy, math

Vus the Cossack and Strings

implementation, math

Extra Element

implementation, math

Exam in BerSU (hard version)

brute force, data structures, greedy, math

Ropewalkers

math

Parallel Universes (Hard)

math, matrices