Browse Problems 
Our Patreons
Diamond Sponsors
Steven & Felix Halim
Reinardus Pradhitya
Gold Sponsors
--- YOUR NAME HERE ----
Silver Sponsors
--- YOUR NAME HERE ----
Bronze Sponsors
Christianto Handojo
Krzysztof Adamek
Fatima Broom
Contribute
Bitcoin:
1ojudgeapLUjJcnUm
ze67a4w3TJ6WnPxo
Browse Problems
| Title | Total Submissions / Solving % | Total Users / Solving % | ||||
|
100 - The 3n + 1 problem | 953805 |
26.80%
|
146908 |
74.06%
|
|
|
|
101 - The Blocks Problem | 127528 |
26.19%
|
25685 |
70.47%
|
|
|
|
102 - Ecological Bin Packing | 111705 |
39.48%
|
32572 |
87.24%
|
|
|
103 - Stacking Boxes | 46566 |
26.90%
|
12472 |
61.45%
|
|
|
|
104 - Arbitrage | 34061 |
25.25%
|
7252 |
68.02%
|
|
|
|
105 - The Skyline Problem | 66247 |
26.16%
|
15859 |
69.33%
|
|
|
|
106 - Fermat vs. Pythagoras | 30334 |
34.13%
|
7160 |
67.37%
|
|
|
|
107 - The Cat in the Hat | 53780 |
21.78%
|
9303 |
68.27%
|
|
|
|
108 - Maximum Sum | 76351 |
44.73%
|
24320 |
83.63%
|
|
|
|
109 - SCUD Busters | 14345 |
32.42%
|
3811 |
68.49%
|
|
|
|
110 - Meta-Loopless Sorts | 13463 |
32.32%
|
3671 |
66.11%
|
|
|
|
111 - History Grading | 36887 |
45.30%
|
13735 |
77.87%
|
|
|
|
112 - Tree Summing | 40027 |
28.40%
|
8248 |
78.19%
|
|
|
|
113 - Power of Cryptography | 79714 |
41.02%
|
25304 |
89.07%
|
|
|
|
114 - Simulation Wizardry | 9135 |
32.44%
|
2646 |
75.09%
|
|
|
|
115 - Climbing Trees | 7793 |
35.21%
|
2344 |
81.19%
|
|
|
|
116 - Unidirectional TSP | 71520 |
25.58%
|
12925 |
72.87%
|
|
|
|
117 - The Postal Worker Rings Once | 10275 |
49.87%
|
4054 |
89.29%
|
|
|
|
118 - Mutant Flatworld Explorers | 31853 |
41.86%
|
10642 |
86.99%
|
|
|
|
119 - Greedy Gift Givers | 46053 |
29.08%
|
13359 |
74.98%
|
|
|
|
120 - Stacks of Flapjacks | 49052 |
41.58%
|
13503 |
87.51%
|
|
|
|
121 - Pipe Fitters | 8629 |
43.01%
|
3475 |
87.02%
|
|
|
|
122 - Trees on the level | 43829 |
29.80%
|
7783 |
74.84%
|
|
|
|
123 - Searching Quickly | 14891 |
35.81%
|
5025 |
75.46%
|
|
|
|
124 - Following Orders | 16010 |
39.41%
|
5227 |
78.94%
|
|
|
|
125 - Numbering Paths | 11441 |
29.74%
|
3271 |
74.78%
|
|
|
|
126 - The Errant Physicist | 4609 |
31.72%
|
1637 |
75.75%
|
|
|
|
127 - "Accordian" Patience | 19873 |
39.80%
|
4933 |
81.69%
|
|
|
|
128 - Software CRC | 20278 |
42.91%
|
4544 |
88.03%
|
|
|
|
129 - Krypton Factor | 16377 |
39.87%
|
3233 |
84.26%
|
|
|
|
130 - Roman Roulette | 10021 |
41.88%
|
4032 |
81.30%
|
|
|
|
131 - The Psychic Poker Player | 4415 |
50.19%
|
1901 |
88.32%
|
|
|
|
132 - Bumpy Objects | 4472 |
42.22%
|
1252 |
82.11%
|
|
|
|
133 - The Dole Queue | 29485 |
49.39%
|
8254 |
88.88%
|
|
|
|
134 - Loglan-A Logical Language | 3799 |
29.61%
|
1135 |
80.35%
|
|
|
|
135 - No Rectangles | 3404 |
28.08%
|
1277 |
53.25%
|
|
|
|
136 - Ugly Numbers | 129532 |
32.99%
|
31080 |
79.58%
|
|
|
|
137 - Polygons | 5075 |
21.81%
|
1154 |
62.22%
|
|
|
|
138 - Street Numbers | 22166 |
45.47%
|
9007 |
84.76%
|
|
|
|
139 - Telephone Tangles | 10405 |
16.21%
|
1740 |
49.20%
|
|
|
|
140 - Bandwidth | 17149 |
43.08%
|
3872 |
87.68%
|
|
|
|
141 - The Spot Game | 9030 |
44.87%
|
2761 |
89.89%
|
|
|
|
142 - Mouse Clicks | 7049 |
22.37%
|
2458 |
46.18%
|
|
|
|
143 - Orchard Trees | 20757 |
12.62%
|
2690 |
44.80%
|
|
|
|
144 - Student Grants | 7862 |
46.44%
|
3182 |
85.23%
|
|
|
|
145 - Gondwanaland Telecom | 10916 |
25.75%
|
2942 |
74.85%
|
|
|
|
146 - ID Codes | 36500 |
57.84%
|
16526 |
93.54%
|
|
|
|
147 - Dollars | 67321 |
29.10%
|
13175 |
75.56%
|
|
|
|
148 - Anagram checker | 5576 |
35.63%
|
1612 |
76.43%
|
|
|
|
149 - Forests | 1396 |
44.41%
|
479 |
75.16%
|
|
|
|
150 - Double Time | 2720 |
32.61%
|
887 |
65.95%
|
|
|
|
151 - Power Crisis | 28692 |
60.42%
|
12407 |
93.10%
|
|
|
|
152 - Tree's a Crowd | 12729 |
39.12%
|
3678 |
87.11%
|
|
|
|
153 - Permalex | 8089 |
29.55%
|
2676 |
70.70%
|
|
|
|
154 - Recycling | 7462 |
53.11%
|
3729 |
89.22%
|
|
|
|
155 - All Squares | 7560 |
50.36%
|
3437 |
86.18%
|
|
|
|
156 - Ananagrams | 36754 |
66.17%
|
12152 |
94.59%
|
|
|
|
157 - Route Finding | 2167 |
32.81%
|
722 |
80.06%
|
|
|
|
158 - Calendar | 3472 |
16.24%
|
794 |
57.30%
|
|
|
|
159 - Word Crosses | 5675 |
24.58%
|
1839 |
60.85%
|
|
|
|
160 - Factors and Factorials | 47482 |
31.87%
|
13044 |
83.13%
|
|
|
|
161 - Traffic Lights | 10886 |
38.60%
|
3645 |
88.89%
|
|
|
|
162 - Beggar My Neighbour | 6769 |
33.03%
|
1977 |
80.78%
|
|
|
|
163 - City Directions | 1896 |
14.87%
|
365 |
57.53%
|
|
|
|
164 - String Computer | 14333 |
31.52%
|
3098 |
75.40%
|
|
|
|
165 - Stamps | 4810 |
40.75%
|
1554 |
80.57%
|
|
|
|
166 - Making Change | 12544 |
39.54%
|
3290 |
86.26%
|
|
|
|
167 - The Sultan's Successors | 30568 |
46.86%
|
8874 |
90.53%
|
|
|
|
168 - Theseus and the Minotaur | 9801 |
34.08%
|
2129 |
73.93%
|
|
|
|
169 - Xenosemantics | 2149 |
19.92%
|
342 |
64.04%
|
|
|
|
170 - Clock Patience | 7457 |
45.30%
|
2773 |
90.23%
|
|
|
|
171 - Car Trialling | 3519 |
14.41%
|
582 |
69.93%
|
|
|
|
172 - Calculator Language | 2727 |
26.15%
|
792 |
69.82%
|
|
|
|
173 - Network Wars | 3129 |
17.48%
|
652 |
46.01%
|
|
|
|
174 - Strategy | 1334 |
39.43%
|
561 |
79.32%
|
|
|
|
175 - Keywords | 2405 |
17.63%
|
585 |
47.69%
|
|
|
|
176 - City Navigation | 987 |
31.81%
|
312 |
79.81%
|
|
|
|
177 - Paper Folding | 4148 |
40.53%
|
1243 |
72.89%
|
|
|
|
178 - Shuffling Patience | 1207 |
38.69%
|
455 |
76.26%
|
|
|
|
179 - Code Breaking | 2420 |
25.12%
|
649 |
72.42%
|
|
|
|
180 - Eeny Meeny | 2690 |
22.57%
|
701 |
43.37%
|
|
|
|
181 - Hearts | 1265 |
48.93%
|
626 |
83.87%
|
|
|
|
182 - Bonus Bonds | 924 |
42.75%
|
449 |
78.62%
|
|
|
|
183 - Bit Maps | 7816 |
26.96%
|
2031 |
76.42%
|
|
|
|
184 - Laser Lines | 5005 |
44.40%
|
1407 |
85.07%
|
|
|
|
185 - Roman Numerals | 3237 |
40.56%
|
1045 |
82.68%
|
|
|
|
186 - Trip Routing | 4807 |
31.50%
|
1592 |
70.29%
|
|
|
|
187 - Transaction Processing | 3830 |
37.55%
|
1414 |
79.28%
|
|
|
|
188 - Perfect Hash | 5479 |
49.04%
|
1882 |
88.47%
|
|
|
|
189 - Pascal Program Lengths | 1137 |
22.78%
|
330 |
61.52%
|
|
|
|
190 - Circle Through Three Points | 18799 |
35.34%
|
5770 |
78.51%
|
|
|
|
191 - Intersection | 31174 |
22.98%
|
6219 |
69.40%
|
|
|
|
192 - Synchronous Design | 1203 |
30.34%
|
434 |
69.35%
|
|
|
|
193 - Graph Coloring | 24728 |
28.49%
|
5916 |
71.08%
|
|
|
|
194 - Triangle | 2807 |
17.31%
|
563 |
48.31%
|
|
|
|
195 - Anagram | 46672 |
25.96%
|
10868 |
69.60%
|
|
|
|
196 - Spreadsheet | 13585 |
25.60%
|
2331 |
76.06%
|
|
|
|
197 - Cube | 1603 |
19.84%
|
389 |
46.27%
|
|
|
|
198 - Peter's Calculator | 3002 |
19.85%
|
653 |
63.86%
|
|
|
|
199 - Partial differential equations | 1040 |
22.50%
|
407 |
44.96%
|
|
| << Start < Prev 1 Next > End >> | ||
| Display # | Results 1 - 100 of 100 | |