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数据结构&算法（45）
Difficulty
The 3n + 1 problem
Ecological Bin Packing
Back to High School Physics
Hashmat the Brave Warrior
TEX Quotes
The Decoder
Ugly Numbers
Jolly Jumpers
Primary Arithmetic
Reverse and Add
Maximum Sum
Power of Cryptography
Kindergarten Counting Game
Train Swapping
The Blocks Problem
Box of Bricks
What's Cryptanalysis?
Ecological Premium
Skew Binary
Combinations
Power Crisis
Perfection
Above Average
Factors and Factorials
Minesweeper
ClockHands
Count on Cantor
Integer Inquiry
What's The Frequency, Kenneth?
Light, More Light
Error Correction
Goldbach's Conjecture
Bicoloring
What is the Median?
Goldbach's Conjecture (II)
The Skyline Problem
Fibonacci Freeze
Word Scramble
Vito's Family
Funny Encryption Method
Quirksome Squares
Street Numbers
Pizza Cutting
Binomial Showdown
History Grading
All in All
Points in Figures: Rectangles
Roman Digititis
Parentheses Balance
Peter's Smoke
Stacks of Flapjacks
To Carry or not to Carry
The Circumference of the Circle
Palindromes
Stacking Boxes
Factorial Frequencies
Pseudo-Random Numbers
Decode the Mad man
Carmichael Numbers
Just the Facts
Eeny Meeny Moo
Longest Common Subsequence
Prime Factors
The Department of Redundancy Department
Summation of Polynomials
Points in Figures: Rectangles and Circles
Kibbles ``n'' Bits ``n'' Bits ``n'' Bits
Prime Cuts
Self Numbers
Oil Deposits
Mutant Flatworld Explorers
The Cat in the Hat
Marvelous Mazes
Tree Summing
The Collatz Sequence
LCD Display
Super long sums
Knight Moves
Humble Numbers
Coin Change
Beat the Spread!
Ackermann Functions
Continued Fractions
Greedy Gift Givers
I Love Big Numbers !
Perfect Cubes
The Sultan's Successors
Encoder and Decoder
Adding Reversed Numbers
Polynomial Showdown
Love Calculator
Circle Through Three Points
The House Of Santa Claus
Ant on a Chessboard
Hangman Judge
Software CRC
The Dole Queue
Rotating Sentences
Cutting Sticks
Generating Fast, Sorted Permutation
Triangle Wave
Uniform Generator
Zeros and Ones
Simply Emirp
Fermat vs. Pythagoras
Machined Surfaces
Factorial! You Must be Kidding!!!
Haiku Review
Rare Order
Is This Integration ?
Common Permutation
Polygon Inside A Circle
Tell me the frequencies!
Unidirectional TSP
Tree Recovery
Simple Base Conversion
Is Bigger Smarter?
A Multiplication Game
Count the factors
Prime Words
Word Index
Ananagrams
Simply Subsets
Points in Figures: Rectangles, Circles, Triangles
Guessing Game
You can say 11
Secret Research
The Knights Of The Round Table
Mischievous Children
The Twin Towers
Roman Roulette
The Seasonal War
Find the Telephone
Fibonacci Numbers
Powers Et Al.
The Postal Worker Rings Once
Longest Paths
Combination Lock
All Squares
Intersection
Euclid Problem
The Land of Justice
Happy Number
Trees on the level
Pipe Fitters
Dog and Gopher
All You Need Is Love
Ordering Tasks
Let Me Count The Ways
Basically Speaking
Ray Through Glasses
Where's Waldorf?
Simply Syntax
The Tourist Guide
Maya Calendar
World Cup Noise
Dungeon Master
Dividing coins
Polly the Polynomial
DNA Sorting
Polynomial Coefficients
One Little, Two Little, Three Little Endians
Optimal Array Multiplication Sequence
Matrix Chain Multiplication
A Node Too Far
Joseph's Cousin
Prime Frequency
Interpreter
Summation of Four Primes
Master-Mind Hints
Student Grants
Smith Numbers
Digit Primes
List of Conquests
SCUD Busters
Baudot Data Communication Code
Automatic Poetry
Twin Primes
Getting in Line
Heavy Cargo
How Many Fibs?
Intersecting Lines
Trouble with a Pentagon
Take the Land
Blowing Fuses
Robot Motion
Hay Points
Rank the Languages
Artificial Intelligence?
Satellites
Word Amalgamation
Longest Nap
Relational Operator
Hanoi Tower Troubles Again!
There's treasure everywhere!
Big Chocolate
Prime Ring Problem
Find the ways !
What Base Is This?
Prime Land
Heads / Tails Probability
The Bases Are Loaded
Self-describing Sequence
Leap Year or Not Leap Year and ...
How many nodes ?
Squares (III)
Repeating Decimals
Check The Check
Divide, But Not Quite Conquer!
Searching Quickly
The Hamming Distance Problem
Beavergnaw
Camel trading
Strategic Defense Initiative
Soundex Indexing
Booklet Printing
Playing with Wheels
Following Orders
Excuses, Excuses!
MPI Maelstrom
Word-Search Wonder
Graph Connectivity
English-Number Translator
Shoemaker's Problem
The Playboy Chimp
Cube painting
Where is the Marble?
Pre, in and post
Audiophobia
Permutation Arrays
Bridge Hands
R U Kidding Mr. Feynman!
The Stern-Brocot Number System
Contest Scoreboard
Pascal's Triangle of Death
Exponentiation
Up and Down Sequences
Compromise
Geometry Paradox
Mother bear
Gondwanaland Telecom
Simple division
The Hotel with Infinite Rooms
Simulation Wizardry
The ? 1 ? 2 ? ... ? n = k problem
Fourth Point !!
Homer Simpson
Extrapolation Using a Difference Table
The path in the colored field
Clock Patience
Irreducable Basic Fractions
Last Digit
Traffic Lights
Divisibility
Closest Sums
Square Pegs And Round Holes
Testing the CATCHER
Perfect P-th Powers
The Grazing Cow
Maze Exploration
All Roads Lead Where?
Longest Run on a Snowboard
What is the Probability ?
Factovisors
Boxes of Chocolates
Don't Get Rooked
Is It A Tree?
Largest Submatrix
Can You Solve It?
The Settlers of Catan
The Archeologists' Dilemma
The jackpot
Ancient Village Sports
Climbing Trees
Free spots
Naughty Sleepy Boys
Rare Easy Problem
Identifying Legal Pascal Real Constants
Making Change
Periodic Strings
Tree's a Crowd
Expanding Fractions
Jill Rides Again
Farey sequences
Counting Rectangles
Simple calculations
An Easy Problem!
Numbering Paths
The Spot Game
Modular Fibonacci
The Tower of Babylon
Recognizing Good ISBNs
Decode the tape
Andy's First Dictionary
Automated Judge Script
Graphical Editor
Counterfeit Dollar
Meta-Loopless Sorts
Graph Coloring
Cows and Cars
Critical Mass
Interpreting Control Sequences
Minimal coverage
String Computer
Cowculations
Ubiquitous Religions
Ocean Deep ! - Make it shallow !!
Little Black Book
Arbitrage (II)
Mr. Azad and his Son!!!!!
Average Speed
Count the Trees
Prime Distance
Network Connections
Power Strings
Marcus, help!
Bachet's Game
Longest Match
Numerically Speaking
Stack 'em Up
Immediate Decodability
Word Morphing
France '98
Play with Floor and Ceil
``Accordian'' Patience
Rational Numbers from Repeating Fractions
The Art Gallery
Almost Prime Numbers
How Many Knights
Center of Masses
The primary problem
Number Chains
Pesky Palindromes
Maximum Sum (II)
Game Show Math
Mirror, Mirror
Automatic Editing
Krypton Factor
Crossword Answers
The Psychic Poker Player
Play on Words
Football (aka Soccer)
Tight Words
Australian Voting
Tic Tac Toe
How Many Trees?
Connect the Campus
Throwing cards away I
Word Problem
Word Length and Frequency
Rings and Glue
Dropping Balls
Do the Untwist
Cellular Structure
Goldbach and Euler
Shipping Routes
How Many Points of Intersection?
The Errant Physicist
Not That Kind of Graph
Il Gioco dell'X
Eb Alto Saxophone Player
Rock, Scissors, Paper
Joana and the Odd Numbers
What Day Is It?
Throwing cards away II
Convex Hull Finding
Transportation
Myacm Triangles
If We Were a Child Again
8 Queens Chess Problem
Searching for Nessy
Crypt Kicker II
Poker Hands
Less Prime
Mine Sweeper
Collecting Beepers
Rock-Paper-Scissors Tournament
The Kissing Circles
Brick Wall Patterns
Overlapping Rectangles
The Falling Leaves
Bangla Numbers
Traffic Volume
Walking on the Safe Side
A mid-summer night's dream.
Knuth's Permutation
Maximum Product
Distinct Subsequences
Message Decoding
What Goes Up
Grid Colouring
23 out of 5
Maze Traversal
Basic Remains
Group Reverse
The Closest Pair Problem
Number Sequence
We Ship Cheap
Request for Proposal
ACM Contest and Blackout
Word Crosses
Ultra-QuickSort
Transaction Processing
Equation Elation
Bee Breeding
Little Bishops
Perfect Hash
Mapping the Swaps
Page Hopping
Factoring Large Numbers
Wetlands of Florida
Not so Mobile
Internet Bandwidth
The Necklace
Factorial Factors
Choose and divide
Fractions Again?!
Very Easy !!!
Moth Eradication
!! Really Strange !!
Euclid's Game
Tri Tiling
Prerequisites?
Loglan-A Logical Language
Mouse Clicks
Quotient Polynomial
(2/3/4)-D Sqr/Rects/Cubes/Boxes?
Antiarithmetic?
Towers of Hanoi
Wavio Sequence
Anagram checker
The decadary watch
Block Voting
How do you add?
Anagrams (II)
Robot maps
Gleaming the Cubes
Rat Attack
Gifts in a Hexagonal Box
Dividing up
18,000 Seconds Remaining
Tower of Cubes
Bumpy Objects
Stone Game
How Many Pieces of Land ?
Arctic Network
Factstone Benchmark
Children's Game
How Big Is It?
Code Refactoring
Team Queue
Crossed Ladders
Travelling Salesman
Cantor Fractions
Word Transformation
Morning Walk
The Grand Dinner
Knights in FEN
Globetrotter
Garden of Eden
The Polynomial Equation
Triple Ties: The Organizer's Nightmare
Laser Lines
Cats, with or without Hats
The One-Handed Typist
Cheapest Base
Nonstop Travel
Copying Books
Useless Tile Packers
B2-Sequence
Flip-Flop the Squarelotron
Pebble Solitaire
Thunder Mountain
A Graph Problem
Traditional BINGO
Matty's Blocks
A-Sequence
Bombs! NO they are Mines!!
Romeo and Juliet !
How Many Dependencies?
Add bricks in the wall
Tourist Guide
Largest Square
Multiplying by Rotation
Always on the run
Largest Block
Prime Time
Power Transmission
How Many Calls?
Jack Straws
Run, Run, Runaround Numbers
Marks Distribution
How many zero's and how many digits ?
Trees on My Island
Lunch in Grid City
Move the bishop
Waking up brain
You want what filled?
Evaluating Simple C Expressions
Meeting Prof. Miguel...
Minimum Sum LCM
Erdos Numbers
Foreign Exchange
Mobile Phone Coverage
String to Palindrome
Colin and Ryan
Again Prime? No Time.
Time Zones
Crypt Kicker
A Flea on a Chessboard
Domino Effect
Magic Numbers
Editor Nottobad
05-2 Rendezvous
Trip Routing
Compound Words
Divisibility of Factors
Making the Grade
All Walks of length ``n'' from the first node
The Marriage Interview :-)
Back to Intermediate Math
Correct Move
Persistent Numbers
Pairsumonious Numbers
Sweet Child Makes Trouble
Linear Cellular Automata
Burrows Wheeler Decoder
Critical Links
Optimal Binary Search Tree
The MTM Machine
Yet another Number Sequence
String Distance and Transform Process
Chopsticks
Beggar My Neighbour
Zipf's Law
The Fun Number System
Height to Area
Riemann vs Mertens
Slash Maze
Send a Table
Grammar Evaluation
My Dear Neighbours
Uncompress
Packing polygons
Again Palindrome
Finding Rectangles
Colour Hash
A hole to catch a man
Three powers
Spiral Tap
Orchard Trees
Balancing Bank Accounts
File Fragmentation
Determinate Prime
Nesting a Bunch of Brackets
Video Surveillance
Killing Aliens in Borg Maze
Turn the Lights Off
Instant Complexity
Lift Hopping
Avoiding Your Boss
Theseus and the Minotaur
Triangular Vertices
Key to Success
Delta-wave
Flight Planner
Find the Permuted String
Brownie Points
Spreadsheet
Dermuba Triangle
Hardwood Species
Primed Subsequence
Building designing
Budget Travel
Learning Portuguese
Palindroms &---& smordnilaP
Biorhythms
Water Falls
Count the Faces.
The dominoes solitaire
Ingenuous Cubrency
Weights and Measures
Compression (II)
Chutes and Ladders
Bridge Hand Evaluator
Safebreaker
Call Forwarding
How old are you?
Bundling Newspapers
Known Plaintext Attack
Adventures in Moving - Part IV
Roads in the North
{Sum+=i++} to Reach N
Rough Roads
The New Villa
Repeated Josephus
Simple Addition
Paper Folding
Postscript
Calories from Fat
The Problem with the Problem Setter
The Lottery
Coconuts, Revisited
Fibinary Numbers
Base Equality
Determine The Combination
Colourful Flowers
The Priest Mathematician
Route Finding
Chessboard in FEN
LCM Cardinality
Telephone Tangles
Make Palindrome
What is the Card?
Center of symmetry
Ferry Loading II
Open Credit System
Exchange Rates
Expression Bracketing
Calculator Language
Fi-binary Number
Edit Step Ladders
Traveling Politician
Gopher and Hawks
Anagrammatic Primes
The dog task
The Party, Part I
False coin
GNU = GNU'sNotUnix
Semi-prime H-numbers
The Vindictive Coach
Recover Factorial
Non-Stop Travel
The Swallowing Ground
Trade on Verweggistan
2D Hieroglyphs decoder
Save Hridoy
Couple-Bachelor-Spinster Numbers.
Pay the Price
Uncle Jack
It's Ir-Resist-Able!
15-Puzzle Problem
Dijkstra, Dijkstra.
Decoding the message.
An Easy Task
The die is cast
Injured Queen Problem
Little Red Riding Hood
Game of Sum
Mapping the Route
I Love Strings!!
Grey Codes
Rational Spiral
Sending email
Simple Minded Hashing
The Last Non-zero Digit.
Marbles on a tree
Matrix Transpose
Counting Cells in a Blob
Back to the 8-Queens
FlatLand Piano Movers
Galactic Import
SameGame Simulation
Polynomial Remains
Bear with me, again..
Longest Palindrome
Wine trading in Gergovia
Divisible Group Sums
Transferable Voting (II)
Watering Grass
Y2K Accounting Bug
The New Rule in Euphomia
The Monocycle
The Candyman Can
Monkeys in a Regular Forest
Determine it
The Game of 31
Parliament
Pushing Boxes
Anagrams by Stack
Double Time
No Rectangles
Major Scales
A New Function
Population Explosion
Pizza Anyone?
Number Theory
Work Reduction
Let's Play Magic!
Hippity Hopscotch
Cutting tabletops
Traffic Flow
Code Breaking
Substitution Cypher
Complex, difficult and complicated
Counting Stars
Forming Quiz Teams
Cosmic Cabbages
John's trip
Finding words
Combination! Once Again
Game of Euler
The Wedding
Graph Construction
Synching Signals
Prince and Princess
Jogging Trails
Counting Rectangles
Equation Solver
Jimmi's Riddles
The Most Potent Corner
The Tower of ASCII
Constructing BST
The Never Ending Towers of Hanoi
Ferry Loading
Andy's Second Dictionary
The easiest way
A Chess Knight
The Other Two Trees
Teobaldo's Trip
Product of digits
The Color Game
Connect the Cable Wires
My T-shirt suits me
Place the Guards
O: dah dah dah!
Long Multiplication
Birthday Cake
A Dinner with Schwarzenegger!!!
Dead Fraction
Cutting Diamonds
Snow Clearing
Car Trialling
So Doku Checker
Egyptian Multiplication
Barbarian tribes
Stamps and Envelope Size
Number Game
The Mad Numerologist
Only I did it!
Tree Reconstruction
Getting Chorded
Addition Chains
Composite Prime
Roman Numerals
A Plug for UNIX
Coast Tracker
Paths through the Hourglass
Swamp County Roofs
Skyscraper Floors
DNA Translation
Minimum Transport Cost
Bit-wise Sequence
Dictionary
Dart-a-Mania
Undraw the Trees
Dice Throwing
Station Balance
From Dusk Till Dawn
Chainsaw Massacre
Just Finish it up
Project Scheduling
Dick and Jane
Say NO to Memorization
Evil Straw Warts Live
Inscribed Circles and Isosceles Triangles
Modular Equations
The Laurel-Hardy Story
Of Circles and Squares
Parking Lot
Strange Planet
Tin Cutter
The Boggle Game
Expanding Rods
Shuffling Patience
Bank (Not Quite O.C.R.)
Sum-up the Primes
The Eurocup is Here!
The Colored Cubes
Vampire Numbers
Rotated square
The Domino Effect
Numbers That Count
Conic Distance
Buying Coke
Pick-up Sticks
Equidivisions
Peter's Calculator
Walk Through the Forest
Island of Logic
Simplifying Fractions
Light and Transparencies
Find the Winning Move
Leading and Trailing
Magic square palindromes.
Deciding victory in Go
Montesco vs Capuleto
Liftless EME
Helping Fill Bates
Travel in Desert
Maximum sum on a torus
Security Panel
The Trip, 2007
The Forrest for the Trees
Temple of Dune
Gopher Strategy
Combo Deal
Board Silly
Spell checker
How Many O's?
Homogeneous squares
Numeric Puzzles Again!
Fibonaccimal Base
Fire Station
Anne's game
Palinwords
Gas Station Numbers
Airline Hub
The Ouroboros problem
Boggle Blitz
Ouroboros Snake
Asterix and Obelix
Kaprekar Numbers
The Poor Giant
Minimum Weight
A Grouping Problem
The Return of the Roman Empire
Hidden squares
Eigensequence
Lowest Price in Town
Message Routing
Equating Equations
Playball !!!
Hidden Truth in Recurrence
Let's Dance !!!
Folding My T-Shirt
Spreadsheet Calculator
Moscow time
Airline Comparison
The Largest/Smallest Box ...
Synchronous Design
Puzzle (II)
Nuts for nuts..
Towards Zero
The Orc Attack
Can of Beans
Test the Rods
Super Lucky Numbers
Dominant Strings
The Sum Equals the Product
Ferry Loading III
Square root
Watching Watches
Critical Wave
So you want to be a 2n-aire?
War on Weather
WFF 'N PROOF
Enigmatic Encryption
Antenna Placement
Mobile Destroyer
Trouble of 13-Dots
Maximum Sub-sequence Product
Rope Crisis in Ropeland!
Contemplation - Algebra
Cat and Mouse
Fire! Fire!! Fire!!!
Doing Windows
Basic wall maze
Race Tracks
Enchanted Forest
Password Search
The Toll! Revisited
Chinese Shuffle
String Factoring
Double Trouble
The most distant state
Can you decide it for ME?
Cube in the labirint
Bean Counting
It's not a Bug, it's a Feature!
Combinatorial Expression
Is There A Second Way Left?
Russian Dolls
Peter Takes a Tramway
The Hybrid Knight
Modern Art
Cow Trouble! Help Please!!
Bonus Bonds
Automorphic Numbers
The Tree Root
Meeting with Aliens
Find the Latitude
God! Save me
Number of Paths
Ferry Loading IV
Curling up the cube
Can't be too GREEDY
Another New Function
Jumping Champion
Flowers of a Beautiful Mind
Automatic Correction of Misspellings
A Puzzling Problem
Free Candies
Complex Numbers
Black and white painting
Poker Solitaire Evaluator
Crime Wave - The Sequel
Bounding box
Travelling Distance
Berry Picking
Crosswords (II)
Boastin' Red Socks
Make Polygon
A Dicey Problem
Always Late
Wind of Change!
How Many Solutions?
Reaching the fix-point.
Circles in Triangle
The Good Old Times
Expressions
Help the Leaders
Maximal Quadrilateral
Optimal Programs
Cheapest way
Broken Keyboard
Sentence/Phrase Generator
Citizen attention offices
Expression Again
Changing Roadmap
Base64 Decoding
Swimming Gopher
Flea circus
End up with More Teams
Glass Beads
Big Big Real Numbers
DNA Sequencing
Loansome Car Buyer
Billiard bounces
Don't Have A Cow, Dude
Scheduling Lectures
Adventure of Super Mario
Chemical Reaction
Triangle Partitioning
Bright Lights
Trees in a Wood.
Multi-peg Towers of Hanoi
Football Sort
Unique Factorization
Complete Tree Labeling
Volleyball
Flipping Colors
The Treasure Hunt
Submarines
Walking on a Grid
Continents
Be Efficient
Smallest Bounding Rectangle
Biometrics
Servicing Stations
The Ghost of Programmers
Dropping water balloons
Calling Circles
Knights' Nightmare
Numbering the Paths
Many a Little makes a Mickle
Place the Guards
Contour Painting
Centipede Collisions
Invitation Cards
A Day in Math-land
Mayor's posters
Super Number
Next Same-Factored
Tug of War
Expression
Dumb Bones
Generalized Matrioshkas
Least Path Cost
Musical instruments
Squares (II)
Lex Smallest Drive
Chocolate Chip Cookies
The Flyover Construction
Difference
Language Cardinality
Monitoring the Amazon
Intersecting Line Segments
The Fibonacci Primes
Another Counting Problem
Reflections
Urn-ball Probabilities !
Throw the Dice
Guess the Number!
Least Squares
The Hendrie Sequence
Number Theory
The Lost Gift
Find the Permutations
Eeny Meeny
Filling the Gaps
Gerg's Cake
Compression
Count the eWords
River Crossing
Processing MX Records
Y3K Problem
Beautiful Points
Abundance and Perfect Numbers
Cutting Up
Street Directions
Faucet Flow
Bob Laptop Woolmer and Eddie Desktop Barlow
The Book-shelver's Problem
Dice from pennies
Safe Salutations
Divisibility Testing
Star not a Tree?
Software Allocation
Treasure Map
The Fortified Forest
Integral Determinant
Danger Point
Intersection is Not that Easy
Annoying painting tool
Bungee Jumping
Koerner's Pub
Sum of Product
Clock solitaire
Flavius Josephus Reloaded
Grocery store
Network Wars
Trexpression
Calculator
No Tipping
Partitioning for fun and profit
The Optimal Super-Highway
The Finite State Text Processing Machine
The least possible effort
Antimonotonicity
Another Puzzling Problem
Gears on a Board
Make Palindrome Checker
Identifying Concurrent Events
Combinatorial Summation
Xenosemantics
Chocolate Box
Consecutive Integers
Cut the Legs
Hyper-drive
Recurrences
The Valentine's Day
Discrete Logging
ASCII Labyrinth
The Gossipy Gossipers Gossip Gossips
Blackbeard the Pirate
Freedom Fighter
Antimatter Ray Clearcutting
Circular Lock
Moliu Fractions
Help My Brother (II)
Swamp County Supervisors
The Great Divide
Mall Mania
Urban Elevations
Triangle Counting
Dihedral groups
Elegant Permuted Sum
The Vigenère Cipher
Savage Garden
First Love !!!
Crazy Savages
Opening Doors
Function Overloading
File Mapping
Frequent Substrings
Nuts and Bolts
Little Ali's Little Brother!
Magic Cube
Planet of the Rock, Paper and Scissors
Movement of Reading Head
The Brick Stops Here
Not the Best
Troublemakers
Open Source
Matching Meetings
Palindromic Permutation
Letter Sequence Analysis
Fitting Text into Slides
K-Multiple Free set
City Directions
Gone Fishing
The silver bullet.
Tour de France
Fifth Bank of Swamp County
Commedia dell' arte
Hoax or what
KuPellaKeS BST
Spreading The News
Lucky Number
Defragment
Lost in Space
Arif in Dhaka (First Love Part 2)
Big Big Trees
Entropy Text Analyzer
Where Can You Hide?
The Golden Pentagon
Babylonian Roulette
Pascal Program Lengths
Cops and Robbers
Intersecting Circles
Advertisement
Rigid Circle Packing
Prim, Prim.
Sorting Slides
Boxes of Chocolates Again
Tarot scores.
Cyborg Genes
The Strange Research
City Navigation
Pattern Matching Prelims
Hotter Colder
Leaps Tall Buildings (in a single bound)
Dear GOD, Pardon Me
Councilling
Advanced Causal Measurements
Min-Max Cake
Mountain Village
Find the Right Changes
Genealogical Research
Probability|Given
Dreisam Equations
New to Bangladesh?
Road Construction
Eat or Not to Eat?
Triple-Free Binary Strings
Adam's Genes
Deciphering Messages
Gift Exchanging
Floor Tiles
Zeroes Revisited
Majoring in Scales
Firemen barracks
Halloween treats
Sandorf's Cipher
The Bumpy Robot
Facing Problem With Trees
Bomb, Divide and Conquer
Sala-ma-Sond, A Nice Little Pond
Jack and Jill
The Same Game
Board Wrapping
Income Tax
Tempus et mobilius. Time and motion
Caesar Cypher
Triangular Square
An antiarithmetic permutation
Power of Matrix
Square of Primes
Maximum Subsequence
Anagram and Multiplication
Seven Seas
Variable Radix Huffman Encoding
Taxicab Numbers
Repackaging
The Scrooge Co Problem
Walking Around Wisely
String Partition
Mirror Maze
Spam or Not Spam
Robots(II)
Expressions
Simply proportion
Hamiltonian Cycle
Headmaster's Headache
Arrange Some Marbles
The broken pedometer
Triangle War
The Uxuhul Voting System
Lock Manager
The Unreal Tournament
Non-Powerful Subsets
Knights Roaming
Placing the Ops
OOPS! They did it Again...
Concatenation of Languages
Rectilinear Polygon
Tile Topology
Euro Cup 2000
Cricket/Football Goes Down
Euler Circuit
Going in circles on Alpha Centauri
Storage Keepers
The Integer All-time Champ
Treblecross
Jack and Jill
Diatribe against Pigeonholes
Signed-digit numbers
Frequent values
Series-Parallel Networks
Suffidromes
Romulan Spelling
Formatting Text
The Programmer's Hex
References
Demerit Points
The Lonesome Cargo Distributor
IIUC HexWorld
Thinking Backward
Fabled Rooks
Jury Compromise
Stamps (II)
Liar or Not Liar that is the...
Coco Monkey
Eventually Periodic Sequence
The knight's Tour
The Gossiping System
Parenthesizing Palindromes
Numerical Methods! A Satire
The Mailbox Manufacturers Problem
Stochastic Digit Generator
Factors and Multiples
Spreadsheet Tracking
The partition of a cake
Spiral of Numbers
Old Wine Into New Bottles
The Wall Pushers
The Eagle's Nest
Doves and bombs
Send More Money
Treasure Hunt
Multinomial Coefficients
A Brief Gerrymander
Knight on the Bee Board
Strange Integration
Ignoring Digits
Winterim Backpacking Trip
Polygon Intersection
Aztec Knights
SQF Problems
Rose windows
Dynamic Frog
Supercomputer Selection, The Sequel
Worm World
Divisibility Testing! Wow!
The Window Property
A Duckpin Tournament
Unique World
Sapitaur's labyrinth
Single-Player Games
Magic Bitstrings
Card Hands
Metal Cutting
Whoever-pick-the-last-one-lose
Sum of powers
Circles in Hexagon :-)
The Pawn Chess
Mysterious Mountain
Optimal House Placement
Rings'n'Ropes
Going in Cycle!!
Partial differential equations
Substitution Cipher
The Perspectographer
Piotr's Ants
The Letter Carrier's Rounds
Deadlock Detection
Many Paths, One Destination
Phylogenetic Trees Inherited
Chessboard
Cockroach Escape Networks
Playing with Coins
Head Judge Headache
Up the Ante
The Tajmahal of ++Y2k
Toroidal Chess Queens' Problem
The Deadly Olympic Returns!!!
Regular Polygon
How Many Triangles?
Inventory Maintenance
Parallelepiped walk
Equidistance
Working With Specific Gravity
KuPellaKeS
Efficient Solutions
Intersecting Rectangles
Hyper Toy Soldiers
Garbage Heap
The Curse of Barbosa
Prime Suspect
Radar Scopes
Keeps Going and Going and ...
Safari Holiday
Optimus Prime
Don Giovanni's Last Dinner
DEL command
Horse Step Maze
Unscrambling Images
According to Bartjens
Infinite Race
Matrix Decompressing
Transportation system.
The problem of the crazy linguist
Blocks on Blocks
Circum Triangle
18-Wheeler Caravans (aka Semigroups)
Right Words
Polygonal Puzzle
Land surveyor's job
Close Relatives
A Logical Problem
Matrix World
Matrix Reloaded
Arithmetic Operations With Large Integers
Trial of the Millennium
Napoleon's Grumble
Colour Circles
Integer Sequences from Addition of Terms
Intelligent Cats
Financial Risk
The Optimal Coffee Shop!!
The n-Dimensional Cities
MIDI Preprocessing
Computer Dialogue
Pit Stop Strategy
Dreadful Vectors
Buy one, get the rest free
Independent Attacking Zones
Kingdom Division
Stand in a Line
Spatial Structures
Tango Tango Insurrection
Another n-Queen Problem
More Triangles ... THE AMBIGUOUS CASE
Number Maze
Audubon's Stormy Arctic Trip
Bigger Square Please...
Playing With Fraction
Looking for a Subset
Zeroes III
Eternal Truths
A Different Task
Get Straight
Economic phone calls
A Major Problem
Sunny Mountains
Fans and Gems
The Absent Minded Professor
Normal Distribution
Series of PI
Mystical Matrix
Hot or Cold?
Lift Hopping in the Real World
Joyful Ride
Intellectual Property
Collectors Problem
Fast and Easy Data Compressor
Power Signs
Fantastic Sequence
Of(f) Course!
BUT We Need a Diagram
Shogi Tournament
Planes around the World
Splat, Inc.
Educational Journey
Matrix Matcher
Tabriz City
Abbott's Revenge
Continuously Growing Fractions
Titans in Danger
Shifted Coefficient Number System
Barcelona's trams
Qualify for the Champions League
Polynomial GCD
Double NP-hard
Treequivalence
Be wary of Roses
Anagram Division
Little Quilt
Dead Or Not -- That Is The Question
System Dependencies
Localized Summing for Blurring
Factory Robot
String Morphing
Going Together
Concurrency Simulator
Numerical Summation of a Series
Translation or rotation
Make a Crystal
Anti-Arithmetic-Sequence
Coin Collector
Meals on Wheels Routing System
Ransom Note
Tic-Tac-Tough
Babel Towers
Switching Channels
Polygon Puzzler
Points, Polygons and Containers
Saving the Planet
How many Knight Placing?
Jill's Bike
Domino Game
Adventures in Moving - Part V
Sum-up the Primes (II)
Mushroom Misery
A Research Problem
Structural Equivalence
Cutting Chains
Fastest Vs Cheapest
Forró Party
Let's swim!
Simplified Shisen-Sho
Euler's Totient Function
Symbolic Numerical System
Constrained Exchange Sort
Escape from Tut's Tomb
Billiard again
Playing War
Welfare Reform
Microzoft Calendar
Bulk Mailing
Chinese Checkers
Cricket Ranking
Parse Tree
Bangladesh Sequences
Paper Folding
Placing Lampposts
Standard Deviation
Art Gallery
Predator II
Poor My Problem! :-(
Innoumerous bowling games
Solving Systems of Linear Equations
The Four in One Stadium
Count the Numbers
Pablito nailed a nail
Prisoners, Boxes and Pieces of Paper
Continuous Fractions
Dancing Digits
Queuing at the doctors
Great Circle
Words adjustment
Troubles for Modern Days Problemsetters
Numerical Maze
2D Representations
Overlapping Rectangles
Coloring the map, but not anyhow
Improved tic-tac-toe.
The Trip II
The Story of Two Coins
The Maximum Term
Odd Root Sum
Setting Problems
Inviting Politicians
Barisal Stadium
Cutting a Polygon
Brownie Points II
The Party, Part II
Khepel's Problem
Texas Trip
HTML Syntax Checking
Another Game of Tetris
The Gift Wrappers of Hollywood
Mars Buggy
Morley's Theorem
Repetitive Multiple
Document Validator
Permutation Representation
Counting Trapizoid
Martin the Gardener
Chasing After Don Giovanni
Follow the Folding Dot
Re-connecting Computer Sites
Meta Editor
Very Funny Mr. Feynman
Ray Inside a Polygon
Basic Tautologies
Square Counting
Coin Changing Again
ASCII Mandelbrot
Horizon Line
Return of the Jedi
Weird Fence
Organising the Organisation
Ants, Aphids and a Ladybug
Galactic Travel
Buddy Memory Allocator
DVD Subtitles
Gaussian Primes
The Predator
Series of Powers
Raucous Rockers
Schedule of Taiwan Baseball League
Hole Cutter
A Square and Equilateral Triangles
Peaceful Sharing
Halting Factor Replacement Systems
Parallel Deadlock
Lead or Gold
Travelling in another Dimension
Maze Statistics
Life Forms
Faulty Computer
Word Search Wonder
Crossword Puzzles
Happy Numbers
Back to Kernighan-Ritchie
Persephone
Wheel Good
Winning Streak
Code Generation
Circuit Nets
Round and Round Maze
Legendary Pokemon
Semi-triangular and also Square
Triangle Covering
Text Formalization
Pentominos
The Falling Pillars
Find the Point
Distant Jumping
A Greener World
From D to E and Back
Mohr's Circle
Automobile Travelling
Relaxed Golf
Monkeys in the Emei Mountain
Dining Diplomats
Image Recognizer
Bridge Building
Right Hand Rule
Continuous Drawing
Monitoring Wheelchair Patients
Character Decoding
Triangular Museum
Queue and A
A Pile of Boxes
Master Mind Helper
Help my Brother
Counting Patterns
Horse Shoe Scoring
Grid Soccer
Petri Net Simulation
Offset Polygons
Diving for Gold
Show the Sequence
Grid Points
Creating Sudoku Puzzles
The Great Escape
A Gentlemen's Agreement
Water Crisis
Theseus and the Minotaur (II)
Rotating Tetris Pieces
Super Divisible Numbers
Saskatchewan
Transferable Voting
Grid Speed
Rational Resistors
Lunar Forest
Kids in a Grid
Teen Girl Squad
Bullet Hole
Gifts Large and Small
Karpovich blocks
The Mosquito Killer Mosquitos
Farewell, my friend
Dueue's Quiz
Mr. And Mrs. Hamilton
Chinese Mahjong
Crosswords
A Very Nasty Text Formatter
No more prerequisites, please!
Herding Frosh
Denki Blocks
Editing a Book
Wild Thing
Evaluating an Equations Board
Scatter Point Plot
Rational Neighbor
Powerful Magic Squares
Working with Small Numbers
Stamping Out Stamps
Magic of David Copperfield
Stopper Stumper
PostScript Emulation
Overlapping Air Traffic Control Zones
Revenge of Faucet Flow
Polygon Encoder
Sex Assignments And Breeding Experiments
Stack of Cylinders
Lemmings Battle!
Mines For Diamonds
The Difference Engine
Guarding the Chessboard
Take Me Home (To the Place I Belong)
Reliable Network
RevolC FaeLoN
Point of View in Flatland
Nondeterministic Trellis Automata
Black & White
Shovelling Snow
Construct the wall maze
Getting There
Train Time
Random number
New Horizons
L-Gap Substrings
Fighting Against a Polygonal Monster
The Hire-a-Coder Business Model
The Abominable Triangleman
Numbers and operations
Lattice Practices
Painting with CSE
Deal or No Deal
Bit Stream
Birthday Cake
Polygon Visibility
Compare Directories
Sweet Dream
Geometry Once Again
How Many Numbers?
Morse Code Generation
HardNumbers
Be Together Again and Forever
New Marketing Plan
Codebreakers
Live From Mars
From G to H and back
Insurrection
Use of Hospital Facilities
Green Eggs and Ham
Running Lights Visibility Calculator
Flight Planning
Tacos Panchita
The Incredible Pile Machine
A Simple Pendulum
Stone Grid
Two Way Traffic
Towers of Powers
Worse Code
Three Pigs
Exponential Function
Gopher that walks and swims
Robot Crash
Bang the Drum Slowly
Department
Straightest Paths
Tile Puzzle
Almost Balanced Trees
Multisets and Sequences
Chemical Attraction
PGA Tour Prize Money
The Rotating Disk
The Gourmet Club
Comment Removal
Named Extension Dialing
Revolutionary Calendar
The Richest Man of the Universe
Treasure Castle
Reading time from a clock
Pattern Transformations
Quarter-Finals with Brazil!? No!!!
What's the Time?
MineSweeper II
Jaguar King
Classifying Lots in a Subdivision
Presentation Error
Scheme Pretty-Printing
The BitPack Data Compression Problem
A Word Puzzle in the Sunny Mountains
Rectangle by the Ocean
Fold-up Patterns
Stretching Geometry
Sugar Cubes
Package Pricing
Hares and Foxes
Counting Quadrilaterals
Find the Sequence
Counting RNA sequences
The Sultan's Problem
Typesetting
Rubik's Cube
Pipeline Scheduling
Triangle Partition
Telephone Directory Alphabetization
Tetravex solver
Car Rallying
Systematic Cyclic Redundancy Check Codes
Square Puzzle
Cutting Corners
Machine Repair Simulation
Radar Tracking
Interpreting Old Maps
Customer Service Cost Evaluation
Optimal Mastermind Strategy
Security by Ambiguity
Radio Direction Finder
Milk Bottle Data
Tweedle Numbers
The Minimum Slot Machine
Crazy Calculator
Working with Relations
One Against Many
Gutenberg Clumsy Helper
Easter Eggs
Polynomial Factorization
Cutting Polyominoes
A Homer's Holiday
Finding Haplotypes
Queen vs Rook
Playfair Cipher
Juggling Trams
Custom Language
The Guessing Game
Mathemagicland
Multi-stage Compressor
An Octal World
Equations in Disguise
Department of Redundancy Department
The Pieces of the Puzzle
Millennium Ceremony
Digital Racing Circuit
Old West Rumours
Prince Frog II
The Ridiculous Game
Digital Logic
Building Construction
Frequency Hopping
Ambiguous or Incomplete Inductive Definitions
The Hazard of CSE Department!
Interpreting SQL
3KP-BASH Project
VTAS - Vessel Traffic Advisory Service
Process Scheduling
Board Game
Global Positioning System
The crusades
Nested Rectangles
Kissin' Cousins
Impossible
Resource Allocation
Impossible
Impossible
Text Comparsion
Impossible
``Cheapest'' Scores
Impossible
Don't Get Hives From This One!
Impossible
Approximate Matches
Impossible
Constitutional Computing
Impossible
Indexing Web Pages
Impossible
WhatFix Notation
Impossible
Robotic Stacker
Impossible
The Reservation Maker
Impossible
Nasty Virus
Impossible
Simultaneous Equations
Impossible
Irrigation Flow Rates
Impossible
Tempus Fugit
Impossible
Morse Mismatches
Impossible
Impossible
Optimal Routing
Impossible
Do You Know the Way to San Jose?
Impossible
Window Frames
Impossible
Schedule Problem
Impossible
The Problem of Train Setout
Impossible
Randomly Wired Neural Nets
Impossible
The Incredible Hull
Impossible
Last Name First, Please
Impossible
Impossible
Convex Hull of the Polygon
Impossible
Calculating Expressions on Turing Machine
Impossible
Impossible
Transform those strings
Impossible
Impossible
Impossible
Flying Stars
Impossible
Divide et unita
Impossible
The JustaPox Language
Impossible
Driving in City Squares
Impossible
Recording a tape
Impossible
Wily Hacker's Problem
Impossible
Sentence Generator
Impossible
Optimisation
Impossible
One Day Tours
Impossible
Impossible
Term Reductions
Impossible
Program Modules
Impossible
Crystal Clear
Impossible
Page Selection by Keyword Matching
Impossible
Polygon Intersections
Impossible
Storing Images in a Sequence
Impossible
Impossible
Balanced Expressions
Impossible
From Databases to XML
Impossible
Dividing Land
Impossible
Polynomial Roots
Impossible
The Probable n-Ascendants
Impossible
Checking the N-Queens Problem
Impossible
Water Flow
Impossible
Overlapping Areas
Impossible
Smart Strategy
Impossible
Mars for Sale
Impossible
Kriss Kross Puzzle
Impossible
Impossible
Impossible
Autobiographical Numbers
Impossible
Permutations
Impossible
Cyclic Numbers
Impossible
Number Format Translator
Impossible
Loading a Cargo Ship
Impossible
Spelling Corrector
Impossible
Police Road Blocks
Impossible
Lost Inheritances
Impossible
Constellations
Impossible
AlienAlgebra
Impossible
Impossible
Impossible
Impossible
Book signatures
Impossible
A Strange Opera House
Impossible
Airplane Scheduling
Impossible
Irrigation
Impossible
Jewel Magnetizer
Impossible
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