題目清單 100 - 999

001 - Volume I
題號 標題 難度 參考解題方向 備註
100 The 3n + 1 problem 1.0 Brute force, Collatz conjecture, 3n+1 lucky 貓
101 The Blocks Problem lucky 貓
102 Ecological Bin Packing 1.5 Brute force lucky 貓
103 Stacking Boxes 2.5 DP, LIS, DAG lucky 貓
104 Arbitrage lucky 貓
105 The Skyline Problem lucky 貓
106 Fermat vs. Pythagoras lucky 貓
107 The Cat in the Hat lucky 貓
108 Maximum Sum 2.5 DP, Max consecutive subsequence 2D lucky 貓
109 SCUD Busters ruby 兔
110 Meta-Loopless Sorts ruby 兔
111 History Grading 2.5 DP, LIS, DAG, Hash lucky 貓
112 Tree Summing lucky 貓
113 Power of Cryptography lucky 貓
114 Simulation Wizardry
115 Climbing Trees lucky 貓
116 Unidirectional TSP lucky 貓
117 The Postal Worker Rings Once ruby 兔
118 Mutant Flatworld Explorers lucky 貓
119 Greedy Gift Givers ruby 兔
120 Stacks of Flapjacks lucky 貓
121 Pipe Fitters ruby 兔
122 Trees on the level lucky 貓
123 Searching Quickly ruby 兔
124 Following Orders lucky 貓
125 Numbering Paths ruby 兔
126 The Errant Physicist ruby 兔
127 "Accordian" Patience lucky 貓
128 Software CRC lucky 貓
129 Krypton Factor ruby 兔
130 Roman Roulette lucky 貓
131 The Psychic Poker Player lucky 貓
132 Bumpy Objects
133 The Dole Queue lucky 貓
134 Loglan-A Logical Language
135 No Rectangles
136 Ugly Numbers lucky 貓
137 Polygons
138 Street Numbers lucky 貓
139 Telephone Tangles ruby 兔
140 Bandwidth ruby 兔
141 The Spot Game ruby 兔
142 Mouse Clicks lucky 貓
143 Orchard Trees lucky 貓
144 Student Grants ruby 兔
145 Gondwanaland Telecom lucky 貓
146 ID Codes 1.0 Next permutation, Permutation, Recursive lucky 貓
147 Dollars 2.5 DP, Coin change lucky 貓
148 Anagram checker ruby 兔
149 Forests
150 Double Time
151 Power Crisis lucky 貓
152 Tree's a Crowd ruby 兔
153 Permalex lucky 貓
154 Recycling
155 All Squares lucky 貓
156 Ananagrams ruby 兔
157 Route Finding
158 Calendar
159 Word Crosses ruby 兔
160 Factors and Factorials 2.0 Number theory, Prime sieve, Factorization lucky 貓
161 Traffic Lights lucky 貓
162 Beggar My Neighbour
163 City Directions
164 String Computer 3.0 DP, Edit distance ruby 兔
165 Stamps

ruby 兔
166 Making Change 2.5 DP, Greedy, Coin change, Bounded knapsack lucky 貓
167 The Sultan's Successors lucky 貓
168 Theseus and the Minotaur
169 Xenosemantics
170 Clock Patience lucky 貓
171 Car Trialling
172 Calculator Language
173 Network Wars
174 Strategy
175 Keywords
176 City Navigation
177 Paper Folding
178 Shuffling Patience
179 Code Breaking
180 Eeny Meeny
181 Hearts
182 Bonus Bonds
183 Bit Maps
184 Laser Lines
185 Roman Numerals
186 Trip Routing
187 Transaction Processing
188 Perfect Hash
189 Pascal Program Lengths
190 Circle Through Three Points lucky 貓
191 Intersection lucky 貓
192 Synchronous Design
193 Graph Coloring lucky 貓
194 Triangle
195 Anagram lucky 貓
196 Spreadsheet
197 Cube ruby 兔
198 Peter's Calculator
199 Partial differential equations
002 - Volume II
題號 標題 難度 參考解題方向 備註
200 Rare Order lucky 貓
201 Squares lucky 貓
202 Repeating Decimals lucky 貓
203 Running Lights Visibility Calculator
204 Robot Crash
205 Getting There
206 Meals on Wheels Routing System
207 PGA Tour Prize Money
208 Firetruck ruby 兔
209 Triangular Vertices ruby 兔
210 Concurrency Simulator
211 The Domino Effect
212 Use of Hospital Facilities
213 Message Decoding ruby 兔
214 Code Generation
215 Spreadsheet Calculator
216 Getting in Line lucky 貓
217 Radio Direction Finder
218 Moth Eradication ruby 兔
219 Department of Redundancy Department
220 Othello
221 Urban Elevations
222 Budget Travel ruby 兔
223 Classifying Lots in a Subdivision
224 Kissin' Cousins
225 Golygons
226 MIDI Preprocessing
227 Puzzle ruby 兔
228 Resource Allocation
229 Scanner
230 Borrowers
231 Testing the CATCHER 2.5 DP, LIS ruby 兔
232 Crossword Answers ruby 兔
233 Package Pricing
234 Switching Channels
235 Typesetting
236 VTAS - Vessel Traffic Advisory Service
237 Monitoring Wheelchair Patients
238 Jill's Bike
239 Tempus et mobilius. Time and motion
240 Variable Radix Huffman Encoding
241 Sail Race
242 Stamps and Envelope Size
243 Theseus and the Minotaur (II)
244 Train Time
245 Uncompress lucky 貓
246 10-20-30
247 Calling Circles lucky 貓
248 Cutting Corners
249 Bang the Drum Slowly
250 Pattern Matching Prelims
251 Nondeterministic Trellis Automata
252 Trucking
253 Cube painting lucky 貓
254 Towers of Hanoi lucky 貓
255 Correct Move ruby 兔
256 Quirksome Squares 1.5 Number theory, Brute force lucky 貓
257 Palinwords lucky 貓
258 Mirror Maze
259 Software Allocation lucky 貓
260 Il Gioco dell'X 2.0 2D map, DFS ruby 兔
261 The Window Property
262 Transferable Voting
263 Number Chains lucky 貓
264 Count on Cantor lucky 貓
265 Dining Diplomats
266 Stamping Out Stamps
267 Of(f) Course!
268 Double Trouble
269 Counting Patterns
270 Lining Up lucky 貓
271 Simply Syntax lucky 貓
272 TEX Quotes 1.0 Ad hoc lucky 貓
273 Jack Straws lucky 貓
274 Cat and Mouse
275 Expanding Fractions lucky 貓
276 Egyptian Multiplication ruby 兔
277 Cabinets
278 Chess ruby 兔
279 Spin
280 Vertex ruby 兔
281 Rubik's Cube
282 Rename
283 Compress
284 Logic
285 Crosswords
286 Dead Or Not -- That Is The Question
287 Text Comparsion
288 Arithmetic Operations With Large Integers ruby 兔
289 A Very Nasty Text Formatter
290 Palindroms <---> smordnilaP lucky 貓
291 The House Of Santa Claus lucky 貓
292 Presentation Error
293 Bits
294 Divisors 2.0 Number theory, Prime sieve, Factorization lucky 貓
295 Fatman
296 Safebreaker ruby 兔
297 Quadtrees ruby 兔
298 Race Tracks
299 Train Swapping 1.0 Ad hoc, Inversion pair ruby 兔
003 - Volume III
題號 標題 難度 參考解題方向 備註
300 Maya Calendar 1.5 Ad hoc, Date problem lucky 貓
301 Transportation ruby 兔
302 John's trip
303 Pipe
304 Department
305 Joseph lucky 貓
306 Cipher lucky 貓
307 Sticks lucky 貓
308 Tin Cutter
309 FORCAL
310 L--system
311 Packets lucky 貓
312 Crosswords (II) ruby 兔
313 Intervals
314 Robot
315 Network 2.5 Graph theory, Articulation point, Connectivity lucky 貓
316 Stars
317 Hexagon
318 Domino Effect
319 Pendulum
320 Border ruby 兔
321 The New Villa
322 Ships
323 Jury Compromise
324 Factorial Frequencies 2.0 Big number, Factorial ruby 兔
325 Identifying Legal Pascal Real Constants ruby 兔
326 Extrapolation Using a Difference Table
327 Evaluating Simple C Expressions ruby 兔
328 The Finite State Text Processing Machine
329 PostScript Emulation
330 Inventory Maintenance
331 Mapping the Swaps ruby 兔
332 Rational Numbers from Repeating Fractions lucky 貓
333 Recognizing Good ISBNs lucky 貓
334 Identifying Concurrent Events
335 Processing MX Records
336 A Node Too Far lucky 貓
337 Interpreting Control Sequences ruby 兔
338 Long Multiplication
339 SameGame Simulation
340 Master-Mind Hints lucky 貓
341 Non-Stop Travel ruby 兔
342 HTML Syntax Checking
343 What Base Is This? lucky 貓
344 Roman Digititis 1.5 String manipulation, Roman number ruby 兔
345 It's Ir-Resist-Able!
346 Getting Chorded
347 Run ruby 兔
348 Optimal Array Multiplication Sequence lucky 貓
349 Transferable Voting (II)
350 Pseudo-Random Numbers lucky 貓
351 ``Cheapest Scores
352 The Seasonal War ruby 兔
353 Pesky Palindromes lucky 貓
354 Crazy Calculator
355 The Bases Are Loaded lucky 貓
356 Square Pegs And Round Holes lucky 貓
357 Let Me Count The Ways 2.5 DP, Coin change (Like UVa 674) lucky 貓
358 Don't Have A Cow, Dude
359 Sex Assignments And Breeding Experiments
360 Don't Get Hives From This One!
361 Cops and Robbers
362 18,000 Seconds Remaining ruby 兔
363 Approximate Matches
364 Constitutional Computing
365 Welfare Reform
366 Cutting Up
367 Halting Factor Replacement Systems
368 Indexing Web Pages
369 Combinations 1.5 Combination, Math lucky 貓
370 Bingo
371 Ackermann Functions 1.0 Collatz conjecture, 3n+1, Simulation ruby 兔
372 WhatFix Notation
373 Romulan Spelling
374 Big Mod lucky 貓
375 Inscribed Circles and Isosceles Triangles lucky 貓
376 More Triangles ... THE AMBIGUOUS CASE
377 Cowculations ruby 兔
378 Intersecting Lines lucky 貓
379 Hi-Q ruby 兔
380 Call Forwarding
381 Making the Grade
382 Perfection 2.0 Number theory, Prime sieve, Factorization, Perfect number lucky 貓
383 Shipping Routes
384 Slurpys ruby 兔
385 DNA Translation
386 Perfect Cubes 1.5 Brute force, Math, Number theory lucky 貓
387 A Puzzling Problem
388 Galactic Import
389 Basically Speaking 1.5 Base conversion, Ad hoc lucky 貓
390 Letter Sequence Analysis
391 Mark-up ruby 兔
392 Polynomial Showdown lucky 貓
393 The Doors ruby 兔
394 Mapmaker
395 Board Silly
396 Top Dog
397 Equation Elation ruby 兔
398 18-Wheeler Caravans (aka Semigroups)
399 Another Puzzling Problem
004 - Volume IV
題號 標題 難度 參考解題方向 備註
400 Unix ls ruby 兔
401 Palindromes ruby 兔
402 M*A*S*H lucky 貓
403 Postscript
404 Radar Scopes
405 Message Routing
406 Prime Cuts lucky 貓
407 Gears on a Board
408 Uniform Generator ruby 兔
409 Excuses, Excuses! lucky 貓
410 Station Balance
411 Centipede Collisions
412 Pi lucky 貓
413 Up and Down Sequences ruby 兔
414 Machined Surfaces ruby 兔
415 Sunrise
416 LED Test ruby 兔
417 Word Index lucky 貓
418 Molecules
419 Matching Meetings
420 Supercomputer Selection, The Sequel
421 Polygonal Puzzle
422 Word-Search Wonder ruby 兔
423 MPI Maelstrom ruby 兔
424 Integer Inquiry 2.0 Big number, Addition lucky 貓
425 Enigmatic Encryption
426 Fifth Bank of Swamp County
427 FlatLand Piano Movers
428 Swamp County Roofs
429 Word Transformation lucky 貓
430 Swamp County Supervisors
431 Trial of the Millennium
432 Modern Art
433 Bank (Not Quite O.C.R.) ruby 兔
434 Matty's Blocks ruby 兔
435 Block Voting lucky 貓
436 Arbitrage (II) ruby 兔
437 The Tower of Babylon 2.5 DP, LIS, DAG lucky 貓
438 The Circumference of the Circle lucky 貓
439 Knight Moves lucky 貓
440 Eeny Meeny Moo ruby 兔
441 Lotto lucky 貓
442 Matrix Chain Multiplication lucky 貓
443 Humble Numbers lucky 貓
444 Encoder and Decoder ruby 兔
445 Marvelous Mazes lucky 貓
446 Kibbles ``n Bits ``n Bits ``n Bits 1.5 Base conversion, Ad hoc lucky 貓
447 Population Explosion
448 OOPS! ruby 兔
449 Majoring in Scales
450 Little Black Book ruby 兔
451 Poker Solitaire Evaluator lucky 貓
452 Project Scheduling
453 Intersecting Circles
454 Anagrams ruby 兔
455 Periodic Strings lucky 貓
456 Robotic Stacker
457 Linear Cellular Automata ruby 兔
458 The Decoder 1.0 Ad hoc, Cryptography lucky 貓
459 Graph Connectivity lucky 貓
460 Overlapping Rectangles ruby 兔
461 The Reservation Maker
462 Bridge Hand Evaluator
463 Polynomial Factorization
464 Sentence/Phrase Generator
465 Overflow lucky 貓
466 Mirror, Mirror ruby 兔
467 Synching Signals
468 Key to Success ruby 兔
469 Wetlands of Florida ruby 兔
470 Nasty Virus
471 Magic Numbers lucky 貓
472 Simultaneous Equations
473 Raucous Rockers
474 Heads / Tails Probability lucky 貓
475 Wild Thing
476 Points in Figures: Rectangles lucky 貓
477 Points in Figures: Rectangles and Circles lucky 貓
478 Points in Figures: Rectangles, Circles, Triangles lucky 貓
479 Irrigation Flow Rates
480 Tempus Fugit
481 What Goes Up 3.0 LIS-nlgn-ver, DP lucky 貓
482 Permutation Arrays lucky 貓
483 Word Scramble lucky 貓
484 The Department of Redundancy Department lucky 貓
485 Pascal's Triangle of Death lucky 貓
486 English-Number Translator lucky 貓
487 Boggle Blitz
488 Triangle Wave lucky 貓
489 Hangman Judge lucky 貓
490 Rotating Sentences lucky 貓
491 Tile Topology
492 Pig-Latin lucky 貓
493 Rational Spiral lucky 貓
494 Kindergarten Counting Game 1.0 Ad hoc, Count word lucky 貓
495 Fibonacci Freeze 2.0 Big number, Addition, Fibonacci number lucky 貓
496 Simply Subsets lucky 貓
497 Strategic Defense Initiative 2.5 DP, LIS lucky 貓
498 Polly the Polynomial lucky 貓
499 What's The Frequency, Kenneth? ruby 兔
005 - Volume V
題號 標題 難度 參考解題方向 備註
500 Table
501 Black Box
502 DEL command
503 Parallelepiped walk
504 Random number
505 Moscow time
506 System Dependencies
507 Jill Rides Again 2.5 DP, Max consecutive subsequence 1D ruby 兔
508 Morse Mismatches
509 RAID!
510 Optimal Routing
511 Do You Know the Way to San Jose?
512 Spreadsheet Tracking
513 Window Frames
514 Rails lucky 貓
515 King
516 Prime Land lucky 貓
517 Word
518 Time
519 Puzzle (II)
520 Append
521 Gossiping
522 Schedule Problem
523 Minimum Transport Cost
524 Prime Ring Problem lucky 貓
525 Milk Bottle Data
526 String Distance and Transform Process
527 The partition of a cake
528 The Problem of Train Setout
529 Addition Chains
530 Binomial Showdown 1.5 Combination, Math lucky 貓
531 Compromise 3.0 DP, LCS ruby 兔
532 Dungeon Master lucky 貓
533 Equation Solver
534 Frogger lucky 貓
535 Globetrotter
536 Tree Recovery lucky 貓
537 Artificial Intelligence? lucky 貓
538 Balancing Bank Accounts
539 The Settlers of Catan ruby 兔
540 Team Queue
541 Error Correction lucky 貓
542 France '98 ruby 兔
543 Goldbach's Conjecture 1.5 Number theory, Prime sieve, Goldbach's conjecture lucky 貓
544 Heavy Cargo lucky 貓
545 Heads ruby 兔
546 Image Recognizer
547 DDF
548 Tree lucky 貓
549 Evaluating an Equations Board
550 Multiplying by Rotation
551 Nesting a Bunch of Brackets
552 Filling the Gaps
553 Simply proportion
554 Caesar Cypher
555 Bridge Hands lucky 貓
556 Amazing
557 Burger lucky 貓
558 Wormholes ruby 兔
559 Squares (II)
560 Magic
561 Jackpot
562 Dividing coins 2.5 DP, 0-1 knapsack, Subset sum lucky 貓
563 Crimewave
564 Gaston
565 Pizza Anyone? lucky 貓
566 Adam's Genes
567 Risk ruby 兔
568 Just the Facts lucky 貓
569 Horse Shoe Scoring
570 Stats
571 Jugs lucky 貓
572 Oil Deposits lucky 貓
573 The Snail lucky 貓
574 Sum It Up 2.0 Recursive, Subset sum lucky 貓
575 Skew Binary 1.5 Ad hoc, Base conversion ruby 兔
576 Haiku Review lucky 貓
577 WIMP
578 Polygon Puzzler
579 ClockHands lucky 貓
580 Critical Mass ruby 兔
581 Word Search Wonder
582 Randomly Wired Neural Nets
583 Prime Factors 2.0 Number theory, Prime sieve, Factorization lucky 貓
584 Bowling
585 Triangles ruby 兔
586 Instant Complexity
587 There's treasure everywhere! lucky 貓
588 Video Surveillance
589 Pushing Boxes
590 Always on the run
591 Box of Bricks 1.0 Ad hoc, Loop lucky 貓
592 Island of Logic
593 MBone
594 One Little, Two Little, Three Little Endians ruby 兔
595 A Major Problem
596 The Incredible Hull
597 Last Name First, Please
598 Bundling Newspapers lucky 貓
599 The Forrest for the Trees
006 - Volume VI
題號 標題 難度 參考解題方向 備註
600 A Duckpin Tournament
601 The PATH
602 What Day Is It? 1.5 Ad hoc, Date problem lucky 貓
603 Parking Lot
604 The Boggle Game
605 The Rotating Disk
606 Keeps Going and Going and ...
607 Scheduling Lectures
608 Counterfeit Dollar lucky 貓
609 Metal Cutting
610 Street Directions
611 Parallel Deadlock
612 DNA Sorting lucky 貓
613 Numbers That Count
614 Mapping the Route
615 Is It A Tree? lucky 貓
616 Coconuts, Revisited
617 Nonstop Travel
618 Doing Windows
619 Numerically Speaking lucky 貓
620 Cellular Structure
621 Secret Research ruby 兔
622 Grammar Evaluation
623 500! 2.0 Big number, Factorial lucky 貓
624 CD 2.5 DP, 0-1 knapsack lucky 貓
625 Compression
626 Ecosystem lucky 貓
627 The Net
628 Passwords
629 Test
630 Anagrams (II)
631 Microzoft Calendar
632 Compression (II)
633 A Chess Knight
634 Polygon
635 Clock solitaire
636 Squares (III)
637 Booklet Printing
638 Finding Rectangles
639 Don't Get Rooked lucky 貓
640 Self Numbers lucky 貓
641 Do the Untwist
642 Word Amalgamation ruby 兔
643 Bulk Mailing
644 Immediate Decodability
645 File Mapping
646 The Gourmet Club
647 Chutes and Ladders
648 Stamps (II)
649 You Who?
650 Bowl
651 Deck
652 Eight
653 Gizilch
654 Ratio
655 Scrabble
656 Optimal Programs
657 The die is cast
658 It's not a Bug, it's a Feature!
659 Reflections
660 Going in circles on Alpha Centauri
661 Blowing Fuses 1.5 Ad hoc, Min max lucky 貓
662 Fast Food
663 Sorting Slides
664 Single-Player Games
665 False coin lucky 貓
666 Rating
667 Fence
668 Parliament lucky 貓
669 Defragment
670 The dog task
671 Spell checker
672 Gangsters
673 Parentheses Balance lucky 貓
674 Coin Change 2.5 DP, Coin change (Like UVa 357) lucky 貓
675 Convex Hull of the Polygon
676 Horse Step Maze
677 All Walks of length ``n from the first node
678 Schedule of Taiwan Baseball League
679 Dropping Balls lucky 貓
680 Movement of Reading Head
681 Convex Hull Finding 3.0 Computational geometry, Convex hull lucky 貓
682 Whoever-pick-the-last-one-lose
683 Character Decoding
684 Integral Determinant
685 Least Path Cost
686 Goldbach's Conjecture (II) 1.5 Number theory, Prime sieve, Goldbach's conjecture lucky 貓
687 Lattice Practices
688 Mobile Phone Coverage
689 Napoleon's Grumble
690 Pipeline Scheduling
691 Triangle Partition
692 BUT We Need a Diagram
693 Digital Racing Circuit
694 The Collatz Sequence 1.0 Collatz conjecture, 3n+1, simulation, Ad hoc lucky 貓
695 Placing the Ops
696 How Many Knights
697 Jack and Jill
698 Index
699 The Falling Leaves lucky 貓
007 - Volume VII
題號 標題 難度 參考解題方向 備註
700 Date Bugs lucky 貓
701 The Archeologists' Dilemma ruby 兔
702 The Vindictive Coach
703 Triple Ties: The Organizer's Nightmare
704 Colour Hash lucky 貓
705 Slash Maze ruby 兔
706 LCD Display lucky 貓
707 Robbery
708 Dreisam Equations
709 Formatting Text
710 The Game
711 Dividing up ruby 兔
712 S-Trees
713 Adding Reversed Numbers lucky 貓
714 Copying Books
715 Substitution Cipher
716 Commedia dell' arte
717 Calculating Expressions on Turing Machine
718 Skyscraper Floors
719 Glass Beads
720 Hares and Foxes
721 Invitation Cards
722 Lakes
723 Comment Removal
724 Reverse (Omran age hallesh koni)
725 Division lucky 貓
726 Decode
727 Equation lucky 貓
728 Scatter Point Plot
729 The Hamming Distance Problem lucky 貓
730 Morse Code Generation
731 Numerical Summation of a Series
732 Anagrams by Stack ruby 兔
733 Follow the Folding Dot
734 The Programmer's Hex
735 Dart-a-Mania
736 Lost in Space
737 Gleaming the Cubes ruby 兔
738 A Logical Problem
739 Soundex Indexing ruby 兔
740 Baudot Data Communication Code lucky 貓
741 Burrows Wheeler Decoder
742 Domino Game
743 The MTM Machine
744 Triangular Museum
745 Numeric Puzzles Again!
746 Polygon Visibility
747 Grid Soccer
748 Exponentiation lucky 貓
749 Machine Repair Simulation
750 8 Queens Chess Problem lucky 貓
751 Triangle War
752 Unscrambling Images
753 A Plug for UNIX
754 Treasure Hunt
755 487-3279 lucky 貓
756 Biorhythms
757 Gone Fishing
758 The Same Game
759 The Return of the Roman Empire lucky 貓
760 DNA Sequencing
761 Transform those strings
762 We Ship Cheap lucky 貓
763 Fibinary Numbers lucky 貓
764 Pentominos
765 References
766 Sum of powers
767 Game
768 Crossword
769 Magic of David Copperfield
770 Puncher
771 Flying Stars
772 Divide et unita
773 The JustaPox Language
774 Driving in City Squares
775 Hamiltonian Cycle
776 Monkeys in a Regular Forest
777 Codebreakers
778 Recording a tape
779 Wily Hacker's Problem
780 Sentence Generator
781 Optimisation
782 Contour Painting
783 Trains
784 Maze Exploration ruby 兔
785 Grid Colouring ruby 兔
786 Working with Relations
787 Maximum Sub-sequence Product
788 One Day Tours
789 Indexing
790 Head Judge Headache
791 Term Reductions
792 Program Modules
793 Network Connections lucky 貓
794 Straightest Paths
795 Sandorf's Cipher
796 Critical Links
797 Two Way Traffic
798 Tile Puzzle
799 Safari Holiday
008 - Volume VIII
題號 標題 難度 參考解題方向 備註
800 Crystal Clear
801 Flight Planning
802 Lead or Gold
803 Page Selection by Keyword Matching
804 Petri Net Simulation
805 Polygon Intersections
806 Spatial Structures
807 Towers of Powers
808 Bee Breeding ruby 兔
809 Bullet Hole
810 A Dicey Problem
811 The Fortified Forest
812 Trade on Verweggistan
813 Robot
814 The Letter Carrier's Rounds
815 Flooded! ruby 兔
816 Abbott's Revenge
817 According to Bartjens
818 Cutting Chains
819 Gifts Large and Small
820 Internet Bandwidth lucky 貓
821 Page Hopping ruby 兔
822 Queue and A
823 Stopper Stumper
824 Coast Tracker
825 Walking on the Safe Side lucky 貓
826 Symbolic Numerical System
827 Buddy Memory Allocator
828 Deciphering Messages
829 Almost Balanced Trees
830 Shark
831 Document Validator
832 Financial Risk
833 Water Falls ruby 兔
834 Continued Fractions 1.5 Ad hoc, Gcd lucky 貓
835 Square of Primes
836 Largest Submatrix lucky 貓
837 Light and Transparencies
838 Worm World lucky 貓
839 Not so Mobile ruby 兔
840 Deadlock Detection
841 Snake
842 Crossword Puzzles
843 Crypt Kicker ruby 兔
844 Pousse
845 Gas Station Numbers lucky 貓
846 Steps 1.5 Ad hoc, Math, Triangular number lucky 貓
847 A Multiplication Game lucky 貓
848 Fmt
849 Radar Tracking
850 Crypt Kicker II ruby 兔
851 Maze
852 Deciding victory in Go
853 DVD Subtitles
854 Worse Code
855 Lunch in Grid City lucky 貓
856 The Vigenère Cipher
857 Quantiser
858 Berry Picking
859 Chinese Checkers
860 Entropy Text Analyzer
861 Little Bishops lucky 貓
862 Origami
863 Process Scheduling
864 Scheme Pretty-Printing
865 Substitution Cypher ruby 兔
866 Intersecting Line Segments 3.0 Computational geometry, Segment intersection
867 Storing Images in a Sequence
868 Numerical Maze
869 Airline Comparison ruby 兔
870 Intersecting Rectangles
871 Counting Cells in a Blob ruby 兔
872 Ordering
873 Loan (II)
874 2D Representations
875 Monopoly
876 Balanced Expressions
877 Offset Polygons
878 Rotating Tetris Pieces
879 Circuit Nets
880 Cantor Fractions 1.5 Math, Cantor, Triangular number lucky 貓
881 Points, Polygons and Containers
882 The Mailbox Manufacturers Problem
883 Overlapping Rectangles
884 Factorial Factors 2.0 Number theory, Prime sieve, Factorization lucky 貓
885 Telephone Directory Alphabetization
886 Named Extension Dialing
887 Revolutionary Calendar
888 Donkey
889 Islands
890 Maze (II)
891 Syntrax
892 Finding words
893 Y3K Problem
894 Juggling Trams
895 Word Problem 1.5 Ad hoc, Word frequency, Dictionary ruby 兔
896 Board Game
897 Anagrammatic Primes ruby 兔
898 Hole Cutter
899 Colour Circles
009 - Volume IX
題號 標題 難度 參考解題方向 備註
900 Brick Wall Patterns ruby 兔
901 From Databases to XML
902 Password Search 2.0 Ad hoc, Hash, Word frequency ruby 兔
903 Spiral of Numbers lucky 貓
904 Overlapping Air Traffic Control Zones
905 Tacos Panchita
906 Rational Neighbor
907 Winterim Backpacking Trip lucky 貓
908 Re-connecting Computer Sites lucky 貓
909 The BitPack Data Compression Problem
910 TV game
911 Multinomial Coefficients
912 Live From Mars
913 Joana and the Odd Numbers 1.0 Math, Square number lucky 貓
914 Jumping Champion 2.0 Number theory, Prime sieve, Count frequency ruby 兔
915 Stack of Cylinders
916 Dividing Land
917 Euro 2004
918 ASCII Mandelbrot
919 Cutting Polyominoes
920 Sunny Mountains 2.5 Computational geometry, Segment intersection ruby 兔
921 A Word Puzzle in the Sunny Mountains
922 Rectangle by the Ocean
923 One Against Many
924 Spreading The News
925 No more prerequisites, please!
926 Walking Around Wisely
927 Integer Sequences from Addition of Terms
928 Eternal Truths
929 Number Maze ruby 兔
930 Polynomial Roots
931 The Probable n-Ascendants
932 Checking the N-Queens Problem
933 Water Flow
934 Overlapping Areas
935 Smart Strategy
936 Mars for Sale
937 Kriss Kross Puzzle
938 Gilix
939 Genes
940 Autobiographical Numbers
941 Permutations ruby 兔
942 Cyclic Numbers
943 Number Format Translator
944 Happy Numbers
945 Loading a Cargo Ship
946 A Pile of Boxes
947 Master Mind Helper
948 Fibonaccimal Base ruby 兔
949 Getaway
950 Tweedle Numbers
951 The Pieces of the Puzzle
952 Uno game
953 The Incredible Pile Machine
954 Tetravex solver
955 Interpreting Old Maps
956 The Minimum Slot Machine
957 Popes
958 A Homer's Holiday
959 Car Rallying
960 Gaussian Primes
961 Ambiguous or Incomplete Inductive Definitions
962 Taxicab Numbers
963 Spelling Corrector
964 Custom Language
965 Police Road Blocks
966 Lost Inheritances
967 Circular ruby 兔
968 Constellations
969 AlienAlgebra
970 Particles
971 Towers
972 Horizon Line
973 The Guessing Game
974 Kaprekar Numbers ruby 兔
975 Gutenberg Clumsy Helper
976 Bridge Building
977 Old West Rumours
978 Lemmings Battle!
979 The Abominable Triangleman
980 X-Express
981 Systematic Cyclic Redundancy Check Codes
982 Cube
983 Localized Summing for Blurring
984 Finding Haplotypes
985 Round and Round Maze
986 How Many?
987 Maternity
988 Many Paths, One Destination
989 Su Doku lucky 貓
990 Diving for Gold 2.5 DP, 0-1 knapsack ruby 兔
991 Safe Salutations ruby 兔
992 Customer Service Cost Evaluation
993 Product of digits 1.5 Greedy lucky 貓
994 POP
995 Super Divisible Numbers
996 Find the Sequence
997 Show the Sequence
998 Dendogram
999 Book signatures