Volume 1 (100-199)

Problem ID Title Solution by Most Popular Input by
100 The 3n + 1 Problem
101 The Blocks Problem
102 Ecological Bin Packing
103 Stacking Boxes
104 Arbitrage
105 The Skyline Problem
106 Fermat vs. Pythagoras
107 The Cat in the Hat
108 Maximum Sum
109 SCUD Busters
110 Meta-Loopless Sorts
111 History Grading
112 Tree Summing
113 Power of Cryptography
114 Simulation Wizardry
115 Climbing Trees
116 Unidirectional TSP
117 The Postal Worker Rings Once
118 Mutant Flatworld Explorers
119 Greedy Gift Givers
120 Stacks of Flapjacks
121 Pipe Fitters
122 Trees on the Level
123 Searching Quickly
124 Following Orders
125 Numbering Paths
126 The Errant Physicist
127 "Accordian" Patience
128 Software CRC
129 Krypton Factor
130 Roman Roulette
131 The Psychic Poker Player
132 Bumpy Objects
133 The Dole Queue
134 Loglan-A Logical Language
135 No Rectangles
136 Ugly Numbers
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137 Polygons
138 Street Numbers
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139 Telephone Tangles
140 Bandwidth
141 The Spot Game
142 Mouse Clicks
143 Orchard Trees
144 Student Grants
145 Gondwanaland Telecom
146 ID Codes
147 Dollars
148 Anagram Checker
149 Forests (1)
150 Double Time
151 Power Crisis
152 Tree's a Crowd
153 Permalex
154 Recycling (1)
155 All Squares
156 Ananagrams
157 Route Finding
158 Calendar
159 Word Crosses
160 Factors and Factorials
161 Traffic Lights
162 Beggar My Neighbour
163 City Directions
164 String Computer
165 Stamps (1)
166 Making Change
167 The Sultan's Successors
168 Theseus and the Minotaur
169 Xenosemantics
170 Clock Patience
171 Car Trialling
172 Calculator Language
173 Network Wars
174 Strategy
175 Keywords
176 City Navigation
177 Paper Folding (I)
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
191 Intersection
192 Synchronous Design
193 Graph Coloring
194 Triangle (1)
195 Anagram
196 Spreadsheet
197 Cube (1)
198 Peter's Calculator
199 Partial Differential Equations