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 | 928499 |
26.64%
|
143309 |
73.83%
|
|
|
|
101 - The Blocks Problem | 124275 |
25.71%
|
25075 |
70.21%
|
|
|
|
102 - Ecological Bin Packing | 110659 |
39.39%
|
32305 |
87.27%
|
|
|
103 - Stacking Boxes | 46080 |
26.68%
|
12330 |
61.22%
|
|
|
|
104 - Arbitrage | 33663 |
25.19%
|
7147 |
67.99%
|
|
|
|
105 - The Skyline Problem | 64881 |
26.05%
|
15609 |
69.19%
|
|
|
|
106 - Fermat vs. Pythagoras | 29910 |
34.24%
|
7079 |
67.30%
|
|
|
|
107 - The Cat in the Hat | 53187 |
21.70%
|
9203 |
68.27%
|
|
|
|
108 - Maximum Sum | 73995 |
44.62%
|
23920 |
83.55%
|
|
|
|
109 - SCUD Busters | 14162 |
32.30%
|
3761 |
68.31%
|
|
|
|
110 - Meta-Loopless Sorts | 13070 |
32.10%
|
3616 |
66.12%
|
|
|
|
111 - History Grading | 35919 |
45.57%
|
13613 |
77.86%
|
|
|
|
112 - Tree Summing | 39513 |
28.29%
|
8153 |
78.17%
|
|
|
|
113 - Power of Cryptography | 78342 |
40.97%
|
24896 |
89.11%
|
|
|
|
114 - Simulation Wizardry | 8974 |
32.57%
|
2610 |
75.33%
|
|
|
|
115 - Climbing Trees | 7695 |
35.18%
|
2313 |
81.37%
|
|
|
|
116 - Unidirectional TSP | 70405 |
25.36%
|
12720 |
72.65%
|
|
|
|
117 - The Postal Worker Rings Once | 10099 |
49.66%
|
3988 |
89.34%
|
|
|
|
118 - Mutant Flatworld Explorers | 28649 |
41.83%
|
10120 |
86.82%
|
|
|
|
119 - Greedy Gift Givers | 45066 |
28.93%
|
13202 |
74.82%
|
|
|
|
120 - Stacks of Flapjacks | 47445 |
41.21%
|
12887 |
87.29%
|
|
|
|
121 - Pipe Fitters | 8428 |
43.20%
|
3430 |
87.32%
|
|
|
|
122 - Trees on the level | 42231 |
29.49%
|
7569 |
74.57%
|
|
|
|
123 - Searching Quickly | 14726 |
35.63%
|
4952 |
75.46%
|
|
|
|
124 - Following Orders | 15028 |
39.11%
|
5103 |
78.80%
|
|
|
|
125 - Numbering Paths | 11255 |
29.73%
|
3232 |
74.78%
|
|
|
|
126 - The Errant Physicist | 4531 |
31.69%
|
1618 |
75.83%
|
|
|
|
127 - "Accordian" Patience | 19226 |
40.08%
|
4846 |
81.59%
|
|
|
|
128 - Software CRC | 20139 |
42.88%
|
4500 |
88.00%
|
|
|
|
129 - Krypton Factor | 16048 |
39.74%
|
3158 |
84.33%
|
|
|
|
130 - Roman Roulette | 9801 |
42.23%
|
3992 |
81.51%
|
|
|
|
131 - The Psychic Poker Player | 4347 |
49.99%
|
1876 |
88.49%
|
|
|
|
132 - Bumpy Objects | 4436 |
42.11%
|
1238 |
82.15%
|
|
|
|
133 - The Dole Queue | 28488 |
49.55%
|
8078 |
88.99%
|
|
|
|
134 - Loglan-A Logical Language | 3755 |
29.56%
|
1122 |
80.30%
|
|
|
|
135 - No Rectangles | 3364 |
27.85%
|
1261 |
53.13%
|
|
|
|
136 - Ugly Numbers | 124879 |
32.88%
|
30552 |
79.44%
|
|
|
|
137 - Polygons | 4926 |
21.56%
|
1133 |
62.05%
|
|
|
|
138 - Street Numbers | 21982 |
45.56%
|
8956 |
84.77%
|
|
|
|
139 - Telephone Tangles | 10318 |
16.14%
|
1726 |
48.90%
|
|
|
|
140 - Bandwidth | 16823 |
43.00%
|
3805 |
87.70%
|
|
|
|
141 - The Spot Game | 8873 |
44.60%
|
2711 |
89.89%
|
|
|
|
142 - Mouse Clicks | 7013 |
22.23%
|
2442 |
45.95%
|
|
|
|
143 - Orchard Trees | 20642 |
12.59%
|
2668 |
44.72%
|
|
|
|
144 - Student Grants | 7708 |
46.61%
|
3130 |
85.37%
|
|
|
|
145 - Gondwanaland Telecom | 10604 |
25.61%
|
2897 |
74.77%
|
|
|
|
146 - ID Codes | 35709 |
57.67%
|
16353 |
93.56%
|
|
|
|
147 - Dollars | 65120 |
28.76%
|
12954 |
75.27%
|
|
|
|
148 - Anagram checker | 5545 |
35.40%
|
1595 |
76.30%
|
|
|
|
149 - Forests | 1316 |
45.82%
|
461 |
75.92%
|
|
|
|
150 - Double Time | 2681 |
32.60%
|
869 |
66.28%
|
|
|
|
151 - Power Crisis | 27383 |
60.57%
|
12117 |
93.17%
|
|
|
|
152 - Tree's a Crowd | 12539 |
39.22%
|
3640 |
87.14%
|
|
|
|
153 - Permalex | 7966 |
29.49%
|
2643 |
70.75%
|
|
|
|
154 - Recycling | 7323 |
53.27%
|
3676 |
89.23%
|
|
|
|
155 - All Squares | 7487 |
50.42%
|
3414 |
86.20%
|
|
|
|
156 - Ananagrams | 35401 |
65.99%
|
11867 |
94.52%
|
|
|
|
157 - Route Finding | 2145 |
32.68%
|
711 |
80.17%
|
|
|
|
158 - Calendar | 3421 |
16.08%
|
782 |
57.16%
|
|
|
|
159 - Word Crosses | 5636 |
24.41%
|
1821 |
60.74%
|
|
|
|
160 - Factors and Factorials | 46654 |
31.79%
|
12928 |
83.04%
|
|
|
|
161 - Traffic Lights | 10655 |
38.70%
|
3578 |
89.07%
|
|
|
|
162 - Beggar My Neighbour | 6419 |
33.51%
|
1920 |
81.20%
|
|
|
|
163 - City Directions | 1873 |
14.74%
|
355 |
58.03%
|
|
|
|
164 - String Computer | 13974 |
31.49%
|
3073 |
75.37%
|
|
|
|
165 - Stamps | 4471 |
41.24%
|
1502 |
80.83%
|
|
|
|
166 - Making Change | 11956 |
39.26%
|
3211 |
86.08%
|
|
|
|
167 - The Sultan's Successors | 28950 |
46.80%
|
8730 |
90.48%
|
|
|
|
168 - Theseus and the Minotaur | 9597 |
33.73%
|
2094 |
73.59%
|
|
|
|
169 - Xenosemantics | 2120 |
19.95%
|
334 |
64.37%
|
|
|
|
170 - Clock Patience | 7351 |
45.46%
|
2747 |
90.24%
|
|
|
|
171 - Car Trialling | 3483 |
14.21%
|
570 |
70.00%
|
|
|
|
172 - Calculator Language | 2701 |
25.81%
|
781 |
69.65%
|
|
|
|
173 - Network Wars | 3081 |
16.91%
|
643 |
44.95%
|
|
|
|
174 - Strategy | 1317 |
39.26%
|
552 |
79.71%
|
|
|
|
175 - Keywords | 2362 |
17.57%
|
574 |
47.56%
|
|
|
|
176 - City Navigation | 979 |
31.97%
|
307 |
80.78%
|
|
|
|
177 - Paper Folding | 3782 |
39.64%
|
1195 |
72.22%
|
|
|
|
178 - Shuffling Patience | 1193 |
38.89%
|
444 |
77.48%
|
|
|
|
179 - Code Breaking | 2392 |
25.29%
|
642 |
72.90%
|
|
|
|
180 - Eeny Meeny | 2663 |
22.57%
|
694 |
43.37%
|
|
|
|
181 - Hearts | 1256 |
48.89%
|
620 |
84.03%
|
|
|
|
182 - Bonus Bonds | 913 |
42.72%
|
444 |
79.05%
|
|
|
|
183 - Bit Maps | 7396 |
26.73%
|
1986 |
76.28%
|
|
|
|
184 - Laser Lines | 4915 |
44.66%
|
1393 |
85.28%
|
|
|
|
185 - Roman Numerals | 3150 |
40.95%
|
1027 |
82.77%
|
|
|
|
186 - Trip Routing | 4786 |
31.45%
|
1583 |
70.31%
|
|
|
|
187 - Transaction Processing | 3804 |
37.59%
|
1404 |
79.42%
|
|
|
|
188 - Perfect Hash | 5367 |
49.13%
|
1852 |
88.34%
|
|
|
|
189 - Pascal Program Lengths | 1117 |
22.83%
|
320 |
62.50%
|
|
|
|
190 - Circle Through Three Points | 18671 |
35.27%
|
5742 |
78.47%
|
|
|
|
191 - Intersection | 30703 |
22.92%
|
6170 |
69.35%
|
|
|
|
192 - Synchronous Design | 1180 |
30.51%
|
429 |
69.46%
|
|
|
|
193 - Graph Coloring | 24078 |
28.50%
|
5803 |
70.86%
|
|
|
|
194 - Triangle | 2763 |
17.08%
|
559 |
48.48%
|
|
|
|
195 - Anagram | 45349 |
25.87%
|
10794 |
69.65%
|
|
|
|
196 - Spreadsheet | 13394 |
25.53%
|
2298 |
76.11%
|
|
|
|
197 - Cube | 1571 |
19.80%
|
384 |
46.09%
|
|
|
|
198 - Peter's Calculator | 2981 |
19.62%
|
645 |
63.57%
|
|
|
|
199 - Partial differential equations | 1031 |
22.21%
|
401 |
44.89%
|
|
| << Start < Prev 1 Next > End >> | ||
| Display # | Results 1 - 100 of 100 | |