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 | 946964 |
26.73%
|
145976 |
73.98%
|
|
|
|
101 - The Blocks Problem | 126819 |
26.05%
|
25561 |
70.42%
|
|
|
|
102 - Ecological Bin Packing | 111396 |
39.43%
|
32505 |
87.25%
|
|
|
103 - Stacking Boxes | 46426 |
26.80%
|
12430 |
61.37%
|
|
|
|
104 - Arbitrage | 33976 |
25.21%
|
7222 |
68.01%
|
|
|
|
105 - The Skyline Problem | 65898 |
26.08%
|
15792 |
69.25%
|
|
|
|
106 - Fermat vs. Pythagoras | 30257 |
34.12%
|
7134 |
67.40%
|
|
|
|
107 - The Cat in the Hat | 53636 |
21.72%
|
9269 |
68.26%
|
|
|
|
108 - Maximum Sum | 75665 |
44.69%
|
24230 |
83.62%
|
|
|
|
109 - SCUD Busters | 14302 |
32.40%
|
3800 |
68.47%
|
|
|
|
110 - Meta-Loopless Sorts | 13428 |
32.22%
|
3659 |
66.08%
|
|
|
|
111 - History Grading | 36652 |
45.30%
|
13694 |
77.88%
|
|
|
|
112 - Tree Summing | 39754 |
28.33%
|
8199 |
78.19%
|
|
|
|
113 - Power of Cryptography | 79501 |
40.99%
|
25240 |
89.09%
|
|
|
|
114 - Simulation Wizardry | 9114 |
32.43%
|
2636 |
75.27%
|
|
|
|
115 - Climbing Trees | 7758 |
35.23%
|
2335 |
81.28%
|
|
|
|
116 - Unidirectional TSP | 71333 |
25.51%
|
12881 |
72.80%
|
|
|
|
117 - The Postal Worker Rings Once | 10215 |
49.78%
|
4040 |
89.33%
|
|
|
|
118 - Mutant Flatworld Explorers | 30602 |
41.79%
|
10461 |
86.88%
|
|
|
|
119 - Greedy Gift Givers | 45735 |
28.97%
|
13323 |
74.94%
|
|
|
|
120 - Stacks of Flapjacks | 48601 |
41.37%
|
13289 |
87.37%
|
|
|
|
121 - Pipe Fitters | 8606 |
43.00%
|
3469 |
87.09%
|
|
|
|
122 - Trees on the level | 43406 |
29.69%
|
7731 |
74.76%
|
|
|
|
123 - Searching Quickly | 14869 |
35.75%
|
5011 |
75.45%
|
|
|
|
124 - Following Orders | 15798 |
39.27%
|
5201 |
78.87%
|
|
|
|
125 - Numbering Paths | 11393 |
29.72%
|
3260 |
74.79%
|
|
|
|
126 - The Errant Physicist | 4596 |
31.70%
|
1633 |
75.81%
|
|
|
|
127 - "Accordian" Patience | 19569 |
40.00%
|
4916 |
81.67%
|
|
|
|
128 - Software CRC | 20251 |
42.92%
|
4536 |
88.05%
|
|
|
|
129 - Krypton Factor | 16301 |
39.86%
|
3218 |
84.24%
|
|
|
|
130 - Roman Roulette | 9924 |
42.08%
|
4019 |
81.34%
|
|
|
|
131 - The Psychic Poker Player | 4378 |
50.11%
|
1892 |
88.42%
|
|
|
|
132 - Bumpy Objects | 4460 |
42.17%
|
1247 |
82.12%
|
|
|
|
133 - The Dole Queue | 29219 |
49.50%
|
8216 |
88.91%
|
|
|
|
134 - Loglan-A Logical Language | 3781 |
29.54%
|
1131 |
80.19%
|
|
|
|
135 - No Rectangles | 3396 |
27.97%
|
1272 |
53.14%
|
|
|
|
136 - Ugly Numbers | 128459 |
32.96%
|
30998 |
79.57%
|
|
|
|
137 - Polygons | 5053 |
21.77%
|
1150 |
62.17%
|
|
|
|
138 - Street Numbers | 22149 |
45.46%
|
8997 |
84.76%
|
|
|
|
139 - Telephone Tangles | 10372 |
16.18%
|
1737 |
49.11%
|
|
|
|
140 - Bandwidth | 17071 |
43.08%
|
3858 |
87.69%
|
|
|
|
141 - The Spot Game | 8981 |
44.79%
|
2747 |
89.95%
|
|
|
|
142 - Mouse Clicks | 7033 |
22.34%
|
2452 |
46.13%
|
|
|
|
143 - Orchard Trees | 20727 |
12.61%
|
2684 |
44.78%
|
|
|
|
144 - Student Grants | 7846 |
46.46%
|
3176 |
85.26%
|
|
|
|
145 - Gondwanaland Telecom | 10807 |
25.60%
|
2919 |
74.82%
|
|
|
|
146 - ID Codes | 36312 |
57.77%
|
16483 |
93.54%
|
|
|
|
147 - Dollars | 66775 |
28.95%
|
13106 |
75.46%
|
|
|
|
148 - Anagram checker | 5572 |
35.61%
|
1609 |
76.44%
|
|
|
|
149 - Forests | 1358 |
45.36%
|
474 |
75.32%
|
|
|
|
150 - Double Time | 2713 |
32.62%
|
883 |
66.14%
|
|
|
|
151 - Power Crisis | 28390 |
60.39%
|
12331 |
93.11%
|
|
|
|
152 - Tree's a Crowd | 12703 |
39.10%
|
3672 |
87.15%
|
|
|
|
153 - Permalex | 8064 |
29.53%
|
2670 |
70.71%
|
|
|
|
154 - Recycling | 7420 |
53.13%
|
3710 |
89.22%
|
|
|
|
155 - All Squares | 7546 |
50.38%
|
3434 |
86.23%
|
|
|
|
156 - Ananagrams | 36263 |
66.24%
|
12081 |
94.57%
|
|
|
|
157 - Route Finding | 2164 |
32.81%
|
720 |
80.28%
|
|
|
|
158 - Calendar | 3457 |
16.20%
|
792 |
57.32%
|
|
|
|
159 - Word Crosses | 5664 |
24.58%
|
1835 |
60.93%
|
|
|
|
160 - Factors and Factorials | 47124 |
31.86%
|
13017 |
83.12%
|
|
|
|
161 - Traffic Lights | 10845 |
38.60%
|
3628 |
89.00%
|
|
|
|
162 - Beggar My Neighbour | 6688 |
33.18%
|
1965 |
81.02%
|
|
|
|
163 - City Directions | 1893 |
14.79%
|
363 |
57.58%
|
|
|
|
164 - String Computer | 14087 |
31.50%
|
3090 |
75.44%
|
|
|
|
165 - Stamps | 4767 |
40.65%
|
1542 |
80.61%
|
|
|
|
166 - Making Change | 12410 |
39.40%
|
3267 |
86.26%
|
|
|
|
167 - The Sultan's Successors | 29867 |
46.57%
|
8825 |
90.52%
|
|
|
|
168 - Theseus and the Minotaur | 9750 |
34.01%
|
2122 |
73.89%
|
|
|
|
169 - Xenosemantics | 2138 |
19.97%
|
340 |
64.12%
|
|
|
|
170 - Clock Patience | 7438 |
45.28%
|
2768 |
90.25%
|
|
|
|
171 - Car Trialling | 3510 |
14.39%
|
580 |
69.83%
|
|
|
|
172 - Calculator Language | 2722 |
26.08%
|
789 |
69.96%
|
|
|
|
173 - Network Wars | 3128 |
17.49%
|
651 |
46.08%
|
|
|
|
174 - Strategy | 1333 |
39.46%
|
560 |
79.46%
|
|
|
|
175 - Keywords | 2388 |
17.71%
|
582 |
47.77%
|
|
|
|
176 - City Navigation | 985 |
31.88%
|
310 |
80.32%
|
|
|
|
177 - Paper Folding | 4109 |
40.40%
|
1227 |
72.70%
|
|
|
|
178 - Shuffling Patience | 1198 |
38.98%
|
448 |
77.46%
|
|
|
|
179 - Code Breaking | 2400 |
25.25%
|
646 |
72.60%
|
|
|
|
180 - Eeny Meeny | 2682 |
22.60%
|
698 |
43.41%
|
|
|
|
181 - Hearts | 1263 |
48.93%
|
625 |
83.84%
|
|
|
|
182 - Bonus Bonds | 923 |
42.80%
|
448 |
78.79%
|
|
|
|
183 - Bit Maps | 7600 |
26.66%
|
2021 |
76.30%
|
|
|
|
184 - Laser Lines | 4989 |
44.42%
|
1402 |
85.24%
|
|
|
|
185 - Roman Numerals | 3232 |
40.53%
|
1041 |
82.71%
|
|
|
|
186 - Trip Routing | 4799 |
31.49%
|
1588 |
70.28%
|
|
|
|
187 - Transaction Processing | 3821 |
37.58%
|
1412 |
79.32%
|
|
|
|
188 - Perfect Hash | 5468 |
48.99%
|
1874 |
88.47%
|
|
|
|
189 - Pascal Program Lengths | 1130 |
22.83%
|
327 |
61.77%
|
|
|
|
190 - Circle Through Three Points | 18759 |
35.32%
|
5766 |
78.51%
|
|
|
|
191 - Intersection | 31024 |
22.92%
|
6212 |
69.40%
|
|
|
|
192 - Synchronous Design | 1201 |
30.31%
|
432 |
69.44%
|
|
|
|
193 - Graph Coloring | 24560 |
28.43%
|
5869 |
70.93%
|
|
|
|
194 - Triangle | 2767 |
17.13%
|
561 |
48.31%
|
|
|
|
195 - Anagram | 46375 |
25.91%
|
10849 |
69.60%
|
|
|
|
196 - Spreadsheet | 13566 |
25.59%
|
2327 |
76.06%
|
|
|
|
197 - Cube | 1591 |
19.80%
|
387 |
45.99%
|
|
|
|
198 - Peter's Calculator | 2998 |
19.85%
|
651 |
63.90%
|
|
|
|
199 - Partial differential equations | 1038 |
22.45%
|
405 |
44.94%
|
|
| << Start < Prev 1 Next > End >> | ||
| Display # | Results 1 - 100 of 100 | |