Tricky Password

Big Problems for Organizers

data structures, graphs, trees

Square Table

Cunning Gena

bitmasks, dp, greedy, sortings

Football

constructive algorithms, graphs, implementation

Crash

implementation

Elimination

dp, math

President's Path

dp, graphs, shortest paths

Population Size

greedy, implementation

Booking System

binary search, dp, greedy

Art Union

brute force, dp, implementation

Guess a number!

greedy, implementation, two pointers

Mashmokh and Tokens

binary search, greedy, math

Mashmokh and Lights

implementation

Mashmokh's Designed Problem

Mashmokh and Water Tanks

binary search, data structures, greedy, two pointers

Mashmokh and Reverse Operation

combinatorics, divide and conquer

Mashmokh and ACM

combinatorics, dp

Mashmokh and Numbers

constructive algorithms, number theory

Maze 2D

data structures

2048

bitmasks, dp

Jeopardy!

greedy

Spyke Chatting

implementation

Data Recovery

implementation

E-mail Addresses

implementation

Giving Awards

dfs and similar

Pattern

implementation

Network Configuration

brute force, greedy, sortings

Poster

greedy, implementation

Kicker

Multi-core Processor

implementation

Password Check

implementation

Feed the Golorp

A + B Strikes Back

math

On a plane

000001

Dome

Big Data

Magnum Opus

Mysterious Language

The Great Game

Garland

implementation

Line to Cashier

implementation

k-d-sequence

data structures

Largest Submatrix 3

dp, hashing

Curious Array

math

Long Path

dp, implementation

Triangle

brute force, implementation, math

Hamming Triples

implementation, math

Hill Climbing

dfs and similar, geometry, trees

Graph Cutting

dfs and similar

Toy Sum

greedy, implementation, math

Unusual Product

implementation, math

Domino Effect

Gravity Flip

greedy, implementation, sortings

Maze 1D

binary search, greedy, implementation

Minesweeper 1D

dp, implementation

Restore Graph

data structures, dfs and similar, graphs, sortings

Marathon

implementation, math

Valera and X

implementation

Two Rooted Trees

data structures, implementation

Beautiful Pairs of Numbers

combinatorics, dp

Strictly Positive Matrix

graphs

Upgrading Array

dp, math

Searching for Graph

brute force, constructive algorithms

Trees in a Row

brute force

Nuts

greedy, math

Olympic Games

math

Roman and Numbers

bitmasks, brute force, combinatorics, dp, number theory

Team

constructive algorithms, greedy, implementation

Sereja and Contests

greedy, implementation, math

Vanya and Cards

implementation, math

Inna and Binary Logic

binary search, bitmasks, data structures

Dima and Bacteria

dsu, graphs, shortest paths

Inna and Huge Candy Matrix

implementation, math

Inna and New Matrix of Candies

brute force, implementation, schedules

Inna and Choose Options

dp, implementation

Red and Blue Balls

Pages

implementation

Sorting Permutations

Instant Messanger

data structures

Tree and Array

constructive algorithms

Painting The Wall

dp, probabilities

Cards

implementation

On Corruption and Numbers

implementation, math

On Segment's Own Points

On Iteration of One Well-Known Function

On Sum of Number of Inversions in Permutations

combinatorics

On Changing Tree

data structures, trees

On Sum of Fractions

math, number theory

On Number of Decompositions into Multipliers

combinatorics, number theory

Lightbulb for Minister

geometry

Physical Education and Buns

brute force, implementation, math

Dominoes

constructive algorithms, greedy

Very Beautiful Number

Counting Sticks

implementation

Three matrices

Nineteen

Deleting Substrings

Three Arrays

data structures