Volume 42 (4,200-4,299)

Problem ID Title Solution by Most Popular Input by
4200 Find the Format String
4201 Switch Bulbs
4202 Schedule of a Married Man
4203 Puzzles of Triangles
4204 Chemical Plant
4205 Clicking Checkboxes
4206 Magic Rings
4207 Line Chart
4208 Mobile Tower
4209 Stopping Doom's Day
4210 Almost Shortest Path
4211 Bases
4212 Candy (1)
4213 DNA Sequences
4214 Electricity
4215 Feynman
4216 Pole Position
4217 Higgs Boson
4218 Traveling Shoemaker Problem
4219 Bora Bora
4220 Shrinking Polygons
4221 Walk in the Park
4222 Dance
4223 Trucking (1)
4224 When
4225 Prime Bases
4226 The Heart of the Country
4227 Shoring Up the Levees
4228 Fred's Lotto Tickets
4229 A No-Win Situation
4230 Teleport Out!
4231 Worms
4232 Sixth Grade Math
4233 Cryptoquote
4234 Binary Clock (1)
4235 Recursively Palindromic Partitions
4236 Text Messaging Improvement?
4237 Extended Normal Order Sort
4238 Area of Polycubes
4239 The Two Note Rag
4240 Joe's Triangular Gardens
4241 Bordering on Madness
4242 Jack of All Trades
4243 LCR
4244 Party Party Party
4245 Su-Su-Sudoku
4246 Tanks a Lot
4247 The Worm Turns
4248 You'll be Working on the Railroad
4249 Heptathlon
4250 MCS
4251 Homing
4253 Archery (1)
4254 Processor
4255 Guess
4256 Salesmen
4257 Hubble Space Telescope
4258 Metal (1)
4259 Dangerous Tunnels
4260 Fortune Card Game
4261 Trip Planning
4262 Road Networks
4263 Early-Morning Pickup
4264 Message
4265 Lost Treasure
4266 Space Elevator
4267 Finding the Heaviest Path
4268 Bonus Adjustment
4269 A Simple Game
4270 Discrete Square Roots
4271 Necklace
4272 Polynomial-Time Reductions
4273 Post Offices (1)
4274 Programmers
4275 Rational Number Approximation
4276 Triangles (2)
4279 Cannonball Pyramids
4280 Pencils from the Nineteenth Century
4282 Painted Calculator
4284 Egyptian Multiplication
4286 Equilibrium Mobile
4287 Proving Equivalences
4288 Cat vs. Dog
4289 Disgruntled Judge
4290 Easy Climb
4291 Sculpture
4292 Matchsticks
4293 White Water Rafting
4294 Shuffle
4295 Videopoker
4296 Bring Your Own Horse
4297 First Knight
4298 Postal Charges
4299 Randomly-Priced Tickets