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 % | ||||
|
300 - Maya Calendar | 13227 |
34.69%
|
3482 |
82.83%
|
|
|
|
301 - Transportation | 8201 |
34.23%
|
2249 |
78.75%
|
|
|
|
302 - John's trip | 12099 |
23.84%
|
1817 |
66.48%
|
|
|
|
303 - Pipe | 1809 |
33.00%
|
502 |
78.88%
|
|
|
|
304 - Department | 826 |
7.87%
|
208 |
17.79%
|
|
|
|
305 - Joseph | 19389 |
49.17%
|
6783 |
88.74%
|
|
|
|
306 - Cipher | 11407 |
22.08%
|
2454 |
63.37%
|
|
|
|
307 - Sticks | 29159 |
21.42%
|
4847 |
57.44%
|
|
|
|
308 - Tin Cutter | 1719 |
34.38%
|
502 |
76.29%
|
|
|
|
309 - FORCAL | 782 |
41.69%
|
300 |
77.67%
|
|
|
|
310 - L--system | 3156 |
18.63%
|
544 |
45.59%
|
|
|
|
311 - Packets | 11163 |
36.31%
|
3333 |
81.73%
|
|
|
312 - Crosswords (II) | 3003 |
19.85%
|
702 |
45.87%
|
|
|
|
313 - Intervals | 2370 |
31.56%
|
667 |
79.01%
|
|
|
|
314 - Robot | 8535 |
30.91%
|
2156 |
76.25%
|
|
|
|
315 - Network | 35896 |
43.08%
|
8192 |
89.18%
|
|
|
|
316 - Stars | 1221 |
12.04%
|
213 |
51.17%
|
|
|
|
317 - Hexagon | 790 |
31.14%
|
296 |
52.36%
|
|
|
|
318 - Domino Effect | 9745 |
28.32%
|
1794 |
78.87%
|
|
|
|
319 - Pendulum | 752 |
24.34%
|
192 |
73.96%
|
|
|
|
320 - Border | 4712 |
43.48%
|
2098 |
80.84%
|
|
|
|
321 - The New Villa | 5834 |
35.62%
|
1401 |
81.58%
|
|
|
|
322 - Ships | 686 |
16.03%
|
184 |
33.70%
|
|
|
|
323 - Jury Compromise | 5407 |
22.84%
|
1025 |
58.05%
|
|
|
|
324 - Factorial Frequencies | 17190 |
57.31%
|
7777 |
90.20%
|
|
|
|
325 - Identifying Legal Pascal Real Constants | 8788 |
32.52%
|
2129 |
79.71%
|
|
|
|
326 - Extrapolation Using a Difference Table | 3145 |
62.83%
|
1798 |
90.38%
|
|
|
|
327 - Evaluating Simple C Expressions | 7714 |
35.52%
|
1747 |
76.47%
|
|
|
|
328 - The Finite State Text Processing Machine | 894 |
28.52%
|
288 |
69.10%
|
|
|
|
329 - PostScript Emulation | 947 |
17.21%
|
227 |
20.26%
|
|
|
|
330 - Inventory Maintenance | 2538 |
11.11%
|
556 |
30.94%
|
|
|
|
331 - Mapping the Swaps | 4303 |
56.77%
|
1970 |
87.51%
|
|
|
|
332 - Rational Numbers from Repeating Fractions | 15022 |
24.18%
|
2570 |
71.75%
|
|
|
|
333 - Recognizing Good ISBNs | 21402 |
16.74%
|
3377 |
52.59%
|
|
|
|
334 - Identifying Concurrent Events | 3667 |
27.90%
|
1199 |
68.81%
|
|
|
|
335 - Processing MX Records | 1798 |
30.53%
|
421 |
76.25%
|
|
|
|
336 - A Node Too Far | 46602 |
30.82%
|
9638 |
83.67%
|
|
|
|
337 - Interpreting Control Sequences | 3704 |
58.34%
|
1637 |
91.51%
|
|
|
|
338 - Long Multiplication | 6757 |
11.37%
|
1450 |
34.14%
|
|
|
|
339 - SameGame Simulation | 2303 |
31.61%
|
786 |
61.20%
|
|
|
|
340 - Master-Mind Hints | 32186 |
44.99%
|
7522 |
90.15%
|
|
|
|
341 - Non-Stop Travel | 7703 |
51.16%
|
2885 |
91.44%
|
|
|
|
342 - HTML Syntax Checking | 1908 |
12.58%
|
293 |
37.20%
|
|
|
|
343 - What Base Is This? | 16765 |
33.53%
|
4354 |
81.74%
|
|
|
|
344 - Roman Digititis | 14425 |
60.67%
|
7613 |
92.85%
|
|
|
|
345 - It's Ir-Resist-Able! | 1936 |
28.10%
|
580 |
70.69%
|
|
|
|
346 - Getting Chorded | 2107 |
45.14%
|
743 |
72.68%
|
|
|
|
347 - Run | 6117 |
31.94%
|
2585 |
56.52%
|
|
|
|
348 - Optimal Array Multiplication Sequence | 18135 |
43.03%
|
5081 |
88.88%
|
|
|
|
349 - Transferable Voting (II) | 1573 |
38.53%
|
657 |
74.12%
|
|
|
|
350 - Pseudo-Random Numbers | 20512 |
55.30%
|
8507 |
91.01%
|
|
|
|
351 - "Cheapest" Scores | 145 |
33.79%
|
41 |
41.46%
|
|
|
|
352 - The Seasonal War | 29869 |
53.95%
|
10896 |
92.90%
|
|
|
|
353 - Pesky Palindromes | 12428 |
47.63%
|
4347 |
88.73%
|
|
|
|
354 - Crazy Calculator | 417 |
16.79%
|
83 |
36.14%
|
|
|
|
355 - The Bases Are Loaded | 19719 |
25.63%
|
4190 |
79.09%
|
|
|
|
356 - Square Pegs And Round Holes | 11010 |
31.82%
|
3289 |
64.18%
|
|
|
|
357 - Let Me Count The Ways | 57723 |
34.80%
|
14364 |
82.34%
|
|
|
|
358 - Don't Have A Cow | 3597 |
38.34%
|
596 |
53.52%
|
|
|
|
359 - Sex Assignments And Breeding Experiments | 1152 |
16.93%
|
139 |
51.80%
|
|
|
|
360 - Don't Get Hives From This One! | 135 |
63.70%
|
41 |
53.66%
|
|
|
|
361 - Cops and Robbers | 7981 |
11.26%
|
1065 |
42.44%
|
|
|
|
362 - 18,000 Seconds Remaining | 8950 |
24.25%
|
1870 |
75.24%
|
|
|
|
363 - Approximate Matches | 104 |
45.19%
|
48 |
52.08%
|
|
|
|
364 - Constitutional Computing | 256 |
9.38%
|
41 |
17.07%
|
|
|
|
365 - Welfare Reform | 1006 |
13.92%
|
181 |
47.51%
|
|
|
|
366 - Cutting Up | 776 |
37.24%
|
341 |
62.76%
|
|
|
|
367 - Halting Factor Replacement Systems | 655 |
18.93%
|
160 |
44.38%
|
|
|
|
368 - Indexing Web Pages | 134 |
14.93%
|
44 |
36.36%
|
|
|
|
369 - Combinations | 47838 |
45.10%
|
15998 |
90.14%
|
|
|
|
370 - Bingo | 908 |
17.40%
|
196 |
48.98%
|
|
|
|
371 - Ackermann Functions | 55096 |
25.07%
|
10020 |
77.81%
|
|
|
|
372 - WhatFix Notation | 363 |
45.45%
|
173 |
61.27%
|
|
|
|
373 - Romulan Spelling | 1576 |
31.92%
|
318 |
52.20%
|
|
|
|
374 - Big Mod | 68244 |
46.92%
|
21814 |
89.58%
|
|
|
|
375 - Inscribed Circles and Isosceles Triangles | 6569 |
30.61%
|
1428 |
77.94%
|
|
|
|
376 - More Triangles ... THE AMBIGUOUS CASE | 1411 |
14.25%
|
287 |
42.86%
|
|
|
|
377 - Cowculations | 3298 |
60.28%
|
1875 |
90.03%
|
|
|
|
378 - Intersecting Lines | 19295 |
41.75%
|
5454 |
84.49%
|
|
|
|
379 - Hi-Q | 1376 |
65.48%
|
886 |
88.26%
|
|
|
|
380 - Call Forwarding | 3274 |
46.98%
|
1212 |
86.96%
|
|
|
|
381 - Making the Grade | 1462 |
54.65%
|
840 |
80.95%
|
|
|
|
382 - Perfection | 66728 |
35.12%
|
19972 |
86.42%
|
|
|
|
383 - Shipping Routes | 9643 |
39.25%
|
3504 |
82.22%
|
|
|
|
384 - Slurpys | 6218 |
47.78%
|
2032 |
83.76%
|
|
|
|
385 - DNA Translation | 1651 |
34.22%
|
509 |
72.10%
|
|
|
|
386 - Perfect Cubes | 18183 |
48.84%
|
6895 |
88.35%
|
|
|
|
387 - A Puzzling Problem | 2873 |
29.93%
|
725 |
61.10%
|
|
|
|
388 - Galactic Import | 1561 |
60.54%
|
864 |
87.73%
|
|
|
|
389 - Basically Speaking | 25782 |
29.09%
|
6165 |
77.00%
|
|
|
|
390 - Letter Sequence Analysis | 1002 |
25.65%
|
400 |
48.50%
|
|
|
|
391 - Mark-up | 4618 |
29.95%
|
1159 |
75.58%
|
|
|
|
392 - Polynomial Showdown | 19577 |
30.10%
|
5757 |
76.06%
|
|
|
|
393 - The Doors | 1846 |
44.15%
|
760 |
83.03%
|
|
|
|
394 - Mapmaker | 6692 |
59.21%
|
3375 |
93.19%
|
|
|
|
395 - Board Silly | 1182 |
29.86%
|
559 |
56.71%
|
|
|
|
396 - Top Dog | 571 |
17.34%
|
166 |
25.30%
|
|
|
|
397 - Equation Elation | 3123 |
48.38%
|
1146 |
87.00%
|
|
|
|
398 - 18-Wheeler Caravans (aka Semigroups) | 987 |
13.88%
|
403 |
29.03%
|
|
|
|
399 - Another Puzzling Problem | 1112 |
29.68%
|
438 |
52.05%
|
|
| << Start < Prev 1 Next > End >> | ||
| Display # | Results 1 - 100 of 100 | |