Parking Lot

data structures, divide and conquer

Dreamoon and Notepad

data structures

Meta-universe

data structures

CGCDSSQ

brute force, data structures, math

Ant colony

data structures, math, number theory

Pillars

binary search, data structures, dp, sortings, trees

Design Tutorial: Increase the Constraints

bitmasks, data structures, fft

MUH and Lots and Lots of Segments

data structures, dsu

Alex and Complicated Task

data structures, dp, greedy

Number of Ways

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

The Classic Problem

data structures, graphs, shortest paths

Appleman and a Sheet of Paper

data structures, implementation

Present

binary search, data structures, greedy

Pashmak and Parmida's problem

data structures, divide and conquer, sortings

Function

data structures

Serega and Fun

data structures

Little Pony and Lord Tirek

data structures

Permutation

data structures, divide and conquer, hashing

Three strings

data structures, dsu, string suffix structures, strings

DZY Loves Fibonacci Numbers

data structures, math, number theory

DZY Loves Modification

brute force, data structures, greedy

DZY Loves Colors

data structures

Adam and Tree

data structures, trees

Artem and Array

data structures, greedy

The Child and Sequence

data structures, math

Banners

brute force, data structures, dp

Cardboard Box

data structures, greedy

Chemistry Experiment

binary search, data structures, ternary search

Tricky Function

data structures, divide and conquer, geometry

Prison Transfer

data structures, implementation

Sereja and Squares

binary search, data structures, hashing

Sereja and Two Sequences

data structures, dp

Biathlon Track

binary search, brute force, constructive algorithms, data structures, dp

Bug in Code

binary search, data structures, sortings

Cup Trick

data structures

Bug in Code

data structures, graphs, implementation, two pointers

Tricky Password

data structures

Big Problems for Organizers

data structures, graphs, trees

Mashmokh's Designed Problem

data structures

Mashmokh and Water Tanks

binary search, data structures, greedy, trees, two pointers

Maze 2D

data structures, divide and conquer

k-d-sequence

data structures

Two Rooted Trees

data structures, implementation, trees

Inna and Binary Logic

binary search, bitmasks, data structures

Instant Messanger

data structures

On Changing Tree

data structures, graphs, trees

Three Arrays

data structures

Supercollider

data structures

Inna and Candy Boxes

data structures

George and Cards

binary search, data structures

Bear and Prime Numbers

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

Propagating tree

data structures, dfs and similar, trees

Milking cows

data structures, greedy

Sereja and Dividing

data structures

Sereja and Brackets

data structures, schedules

New Year Tree

data structures, divide and conquer, trees

Developing Game

data structures

Preparing for the Contest

binary search, data structures, greedy, sortings

Tree and Queries

data structures, dfs and similar, trees

Maximum Submatrix 2

data structures, dp, implementation, sortings

Inna and Babies

binary search, data structures, dsu, geometry, implementation

Inna and Sequence

binary search, data structures, dp, trees

Choosing Subtree is Fun

binary search, data structures, dfs and similar, trees, two pointers

Watching Fireworks is Fun

data structures, dp, math

Vessels

data structures, dsu, implementation, trees

Valera and Queries

binary search, data structures

Sereja and Suffixes

data structures, dp

Sereja ans Anagrams

binary search, data structures

Sereja and Algorithm

data structures, implementation

Dima and Trap Graph

binary search, data structures, dfs and similar, dsu, shortest paths, two pointers

Matrix

combinatorics, data structures, implementation

Two Circles

brute force, data structures, implementation

Fools and Foolproof Roads

data structures, dfs and similar, dsu, graphs, greedy

Insertion Sort

data structures, dp, implementation, math

Pair of Numbers

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

Knight Tournament

data structures, dsu

Jeff and Removing Periods

data structures

Looking for Owls

binary search, data structures, geometry, hashing, sortings

Color the Fence

data structures, dp, greedy, implementation

Subset Sums

brute force, data structures

Water Tree

data structures, dfs and similar, graphs, trees

Alternating Current

data structures, greedy, implementation

Xenia and Tree

data structures, divide and conquer, trees

Iahub and Xors

data structures

Bubble Sort Graph

binary search, data structures, dp

Xenia and Bit Operations

data structures, trees

Optimize!

data structures

Students' Revenge

data structures, greedy, sortings

Maximum Absurdity

data structures, dp, implementation

Escaping on Beaveractor

data structures, implementation, trees

Shave Beaver!

data structures

Oh Sweet Beaverette

data structures, sortings

Two permutations

data structures

Ciel and Gondolas

data structures, divide and conquer, dp

Ping-Pong

data structures

Psychos in a Line

data structures, implementation

Summer Homework

data structures, math

Summer Homework

data structures, math

Summer Homework

brute force, data structures

Sereja and Straight Lines

binary search, data structures, geometry, sortings, two pointers