Browse Problems 
Browse Problems
| Title | Total Submissions / Solving % | Total Users / Solving % | ||||
|
|
100 - The 3n + 1 problem | 839610 |
26.47%
|
127723 |
73.28%
|
|
|
|
101 - The Blocks Problem | 109810 |
24.09%
|
22237 |
69.04%
|
|
|
|
102 - Ecological Bin Packing | 105016 |
39.05%
|
30260 |
87.20%
|
|
|
103 - Stacking Boxes | 44085 |
25.81%
|
11633 |
60.00%
|
|
|
|
104 - Arbitrage | 31651 |
24.50%
|
6585 |
67.93%
|
|
|
|
105 - The Skyline Problem | 58898 |
25.27%
|
14200 |
67.72%
|
|
|
|
106 - Fermat vs. Pythagoras | 29029 |
33.95%
|
6733 |
66.91%
|
|
|
|
107 - The Cat in the Hat | 51864 |
21.26%
|
8824 |
67.80%
|
|
|
|
108 - Maximum Sum | 65309 |
43.93%
|
21526 |
83.12%
|
|
|
|
109 - SCUD Busters | 13304 |
32.10%
|
3477 |
69.05%
|
|
|
|
110 - Meta-Loopless Sorts | 11944 |
30.68%
|
3290 |
63.98%
|
|
|
|
111 - History Grading | 33125 |
44.85%
|
12715 |
77.29%
|
|
|
|
112 - Tree Summing | 38225 |
27.73%
|
7700 |
77.75%
|
|
|
|
113 - Power of Cryptography | 69674 |
40.71%
|
22231 |
88.94%
|
|
|
|
114 - Simulation Wizardry | 8677 |
31.94%
|
2466 |
74.86%
|
|
|
|
115 - Climbing Trees | 7387 |
34.86%
|
2174 |
81.42%
|
|
|
|
116 - Unidirectional TSP | 60325 |
23.59%
|
10777 |
70.37%
|
|
|
|
117 - The Postal Worker Rings Once | 9245 |
48.80%
|
3668 |
89.72%
|
|
|
|
118 - Mutant Flatworld Explorers | 22595 |
39.87%
|
8345 |
85.93%
|
|
|
|
119 - Greedy Gift Givers | 40180 |
28.39%
|
11864 |
73.62%
|
|
|
|
120 - Stacks of Flapjacks | 41112 |
40.60%
|
11127 |
86.94%
|
|
|
|
121 - Pipe Fitters | 7837 |
42.27%
|
3148 |
86.91%
|
|
|
|
122 - Trees on the level | 33827 |
28.11%
|
6243 |
73.14%
|
|
|
|
123 - Searching Quickly | 13828 |
34.68%
|
4579 |
74.95%
|
|
|
|
124 - Following Orders | 13126 |
38.91%
|
4602 |
77.84%
|
|
|
|
125 - Numbering Paths | 10160 |
28.04%
|
2894 |
73.05%
|
|
|
|
126 - The Errant Physicist | 4421 |
31.31%
|
1570 |
75.61%
|
|
|
|
127 - "Accordian" Patience | 17107 |
38.93%
|
4330 |
80.58%
|
|
|
|
128 - Software CRC | 19404 |
42.44%
|
4191 |
88.76%
|
|
|
|
129 - Krypton Factor | 12343 |
38.33%
|
2588 |
83.11%
|
|
|
|
130 - Roman Roulette | 9309 |
41.86%
|
3785 |
81.74%
|
|
|
|
131 - The Psychic Poker Player | 4063 |
50.65%
|
1783 |
89.06%
|
|
|
|
132 - Bumpy Objects | 4304 |
41.15%
|
1131 |
82.14%
|
|
|
|
133 - The Dole Queue | 23069 |
48.62%
|
6917 |
88.64%
|
|
|
|
134 - Loglan-A Logical Language | 3618 |
28.77%
|
1063 |
79.96%
|
|
|
|
135 - No Rectangles | 3132 |
26.69%
|
1143 |
51.44%
|
|
|
|
136 - Ugly Numbers | 105580 |
32.24%
|
27311 |
78.44%
|
|
|
|
137 - Polygons | 4765 |
20.84%
|
1086 |
61.97%
|
|
|
|
138 - Street Numbers | 21039 |
45.16%
|
8541 |
84.44%
|
|
|
|
139 - Telephone Tangles | 9883 |
15.78%
|
1591 |
48.96%
|
|
|
|
140 - Bandwidth | 14020 |
43.10%
|
3257 |
89.53%
|
|
|
|
141 - The Spot Game | 7962 |
43.22%
|
2470 |
89.84%
|
|
|
|
142 - Mouse Clicks | 6865 |
21.98%
|
2396 |
45.24%
|
|
|
|
143 - Orchard Trees | 20205 |
12.21%
|
2552 |
43.03%
|
|
|
|
144 - Student Grants | 7172 |
46.70%
|
2908 |
85.28%
|
|
|
|
145 - Gondwanaland Telecom | 9804 |
24.33%
|
2659 |
73.56%
|
|
|
|
146 - ID Codes | 32405 |
56.81%
|
14842 |
93.48%
|
|
|
|
147 - Dollars | 57103 |
27.51%
|
11803 |
73.97%
|
|
|
|
148 - Anagram checker | 5249 |
35.04%
|
1472 |
77.04%
|
|
|
|
149 - Forests | 1231 |
44.19%
|
394 |
75.13%
|
|
|
|
150 - Double Time | 2515 |
30.38%
|
772 |
63.60%
|
|
|
|
151 - Power Crisis | 24582 |
60.01%
|
11037 |
92.99%
|
|
|
|
152 - Tree's a Crowd | 11836 |
39.24%
|
3433 |
86.86%
|
|
|
|
153 - Permalex | 7685 |
28.72%
|
2519 |
70.03%
|
|
|
|
154 - Recycling | 6686 |
53.23%
|
3371 |
89.77%
|
|
|
|
155 - All Squares | 7138 |
49.55%
|
3246 |
85.83%
|
|
|
|
156 - Ananagrams | 27362 |
62.81%
|
9740 |
94.14%
|
|
|
|
157 - Route Finding | 2066 |
31.12%
|
654 |
79.36%
|
|
|
|
158 - Calendar | 3116 |
15.69%
|
706 |
56.94%
|
|
|
|
159 - Word Crosses | 5499 |
23.97%
|
1769 |
60.26%
|
|
|
|
160 - Factors and Factorials | 43624 |
31.49%
|
12287 |
82.53%
|
|
|
|
161 - Traffic Lights | 9386 |
37.82%
|
3103 |
88.40%
|
|
|
|
162 - Beggar My Neighbour | 5469 |
32.99%
|
1658 |
80.70%
|
|
|
|
163 - City Directions | 1806 |
14.67%
|
326 |
60.74%
|
|
|
|
164 - String Computer | 13139 |
31.00%
|
2855 |
74.57%
|
|
|
|
165 - Stamps | 3948 |
39.44%
|
1311 |
80.24%
|
|
|
|
166 - Making Change | 10356 |
38.61%
|
2917 |
85.57%
|
|
|
|
167 - The Sultan's Successors | 23291 |
48.50%
|
7936 |
90.65%
|
|
|
|
168 - Theseus and the Minotaur | 8929 |
32.94%
|
1892 |
72.41%
|
|
|
|
169 - Xenosemantics | 2093 |
19.92%
|
319 |
66.14%
|
|
|
|
170 - Clock Patience | 7030 |
44.81%
|
2591 |
90.20%
|
|
|
|
171 - Car Trialling | 3422 |
13.73%
|
547 |
70.38%
|
|
|
|
172 - Calculator Language | 2646 |
25.59%
|
754 |
70.16%
|
|
|
|
173 - Network Wars | 3020 |
16.36%
|
627 |
43.86%
|
|
|
|
174 - Strategy | 1272 |
38.21%
|
522 |
79.50%
|
|
|
|
175 - Keywords | 2330 |
17.17%
|
557 |
47.04%
|
|
|
|
176 - City Navigation | 962 |
31.60%
|
298 |
81.54%
|
|
|
|
177 - Paper Folding | 3227 |
38.21%
|
1064 |
69.83%
|
|
|
|
178 - Shuffling Patience | 1175 |
38.55%
|
434 |
77.65%
|
|
|
|
179 - Code Breaking | 2307 |
25.57%
|
627 |
73.21%
|
|
|
|
180 - Eeny Meeny | 2614 |
22.23%
|
669 |
42.15%
|
|
|
|
181 - Hearts | 1201 |
47.63%
|
578 |
83.74%
|
|
|
|
182 - Bonus Bonds | 893 |
42.89%
|
428 |
80.61%
|
|
|
|
183 - Bit Maps | 6368 |
25.85%
|
1767 |
75.83%
|
|
|
|
184 - Laser Lines | 4550 |
44.20%
|
1331 |
85.12%
|
|
|
|
185 - Roman Numerals | 2485 |
42.01%
|
878 |
84.51%
|
|
|
|
186 - Trip Routing | 4651 |
30.98%
|
1520 |
70.00%
|
|
|
|
187 - Transaction Processing | 3392 |
36.26%
|
1314 |
78.61%
|
|
|
|
188 - Perfect Hash | 5074 |
48.88%
|
1701 |
89.01%
|
|
|
|
189 - Pascal Program Lengths | 1058 |
22.87%
|
305 |
61.97%
|
|
|
|
190 - Circle Through Three Points | 18059 |
35.00%
|
5574 |
78.27%
|
|
|
|
191 - Intersection | 28902 |
22.65%
|
5884 |
69.02%
|
|
|
|
192 - Synchronous Design | 1160 |
30.26%
|
416 |
69.71%
|
|
|
|
193 - Graph Coloring | 20396 |
28.06%
|
5032 |
69.75%
|
|
|
|
194 - Triangle | 2661 |
15.86%
|
536 |
46.46%
|
|
|
|
195 - Anagram | 41636 |
25.19%
|
10035 |
68.79%
|
|
|
|
196 - Spreadsheet | 12109 |
24.59%
|
2006 |
75.57%
|
|
|
|
197 - Cube | 1496 |
19.05%
|
364 |
44.23%
|
|
|
|
198 - Peter's Calculator | 2898 |
19.43%
|
605 |
64.63%
|
|
|
|
199 - Partial differential equations | 995 |
20.70%
|
372 |
42.47%
|
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| Display # | Results 1 - 100 of 100 | |