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 % | ||||
|
600 - A Duckpin Tournament | 1466 |
16.44%
|
300 |
34.33%
|
|
|
|
601 - The PATH | 5190 |
29.61%
|
1336 |
73.43%
|
|
|
|
602 - What Day Is It? | 10903 |
25.84%
|
1884 |
65.45%
|
|
|
|
603 - Parking Lot | 3654 |
24.27%
|
962 |
50.52%
|
|
|
|
604 - The Boggle Game | 4585 |
31.06%
|
1002 |
63.87%
|
|
|
605 - The Rotating Disk | 696 |
8.76%
|
116 |
28.45%
|
|
|
|
606 - Keeps Going and Going and ... | 730 |
16.44%
|
248 |
44.76%
|
|
|
|
607 - Scheduling Lectures | 7914 |
27.84%
|
1686 |
65.90%
|
|
|
|
608 - Counterfeit Dollar | 9686 |
35.61%
|
3115 |
78.43%
|
|
|
|
609 - Metal Cutting | 1541 |
19.34%
|
337 |
44.21%
|
|
|
|
610 - Street Directions | 9280 |
40.96%
|
2402 |
82.97%
|
|
|
|
611 - Parallel Deadlock | 486 |
15.43%
|
178 |
33.71%
|
|
|
|
612 - DNA Sorting | 47932 |
24.08%
|
9359 |
68.31%
|
|
|
|
613 - Numbers That Count | 2955 |
22.94%
|
906 |
50.88%
|
|
|
|
614 - Mapping the Route | 3118 |
35.73%
|
1127 |
71.69%
|
|
|
|
615 - Is It A Tree? | 24139 |
22.25%
|
4349 |
67.56%
|
|
|
|
616 - Coconuts, Revisited | 13509 |
29.22%
|
2998 |
72.65%
|
|
|
|
617 - Nonstop Travel | 2694 |
46.62%
|
1225 |
85.63%
|
|
|
|
618 - Doing Windows | 1197 |
27.49%
|
430 |
66.51%
|
|
|
|
619 - Numerically Speaking | 4583 |
49.95%
|
1679 |
86.42%
|
|
|
|
620 - Cellular Structure | 4087 |
53.05%
|
1832 |
86.79%
|
|
|
|
621 - Secret Research | 35682 |
47.10%
|
14304 |
90.12%
|
|
|
|
622 - Grammar Evaluation | 3171 |
25.01%
|
1062 |
59.04%
|
|
|
|
623 - 500! | 50353 |
30.68%
|
12745 |
74.92%
|
|
|
|
624 - CD | 50753 |
46.48%
|
11530 |
89.71%
|
|
|
|
625 - Compression | 1548 |
20.03%
|
405 |
59.01%
|
|
|
|
626 - Ecosystem | 3974 |
41.95%
|
1493 |
84.53%
|
|
|
|
627 - The Net | 6898 |
42.59%
|
2286 |
86.35%
|
|
|
|
628 - Passwords | 11595 |
58.71%
|
3939 |
90.58%
|
|
|
|
629 - Test | 556 |
52.52%
|
187 |
73.80%
|
|
|
|
630 - Anagrams (II) | 8542 |
27.50%
|
2329 |
68.87%
|
|
|
|
631 - Microzoft Calendar | 684 |
18.57%
|
170 |
57.06%
|
|
|
|
632 - Compression (II) | 2909 |
25.95%
|
804 |
71.89%
|
|
|
|
633 - A Chess Knight | 3046 |
22.06%
|
658 |
82.37%
|
|
|
|
634 - Polygon | 5707 |
52.99%
|
1980 |
90.56%
|
|
|
|
635 - Clock solitaire | 484 |
55.99%
|
243 |
83.54%
|
|
|
|
636 - Squares (III) | 4633 |
54.41%
|
2255 |
92.33%
|
|
|
|
637 - Booklet Printing | 10040 |
44.99%
|
4082 |
86.67%
|
|
|
|
638 - Finding Rectangles | 2905 |
37.04%
|
917 |
71.65%
|
|
|
|
639 - Don't Get Rooked | 9383 |
59.35%
|
4033 |
91.69%
|
|
|
|
640 - Self Numbers | 16447 |
50.16%
|
6075 |
89.84%
|
|
|
|
641 - Do the Untwist | 2616 |
65.06%
|
1359 |
91.54%
|
|
|
|
642 - Word Amalgamation | 8635 |
55.32%
|
3701 |
92.22%
|
|
|
|
643 - Bulk Mailing | 680 |
18.68%
|
184 |
50.00%
|
|
|
|
644 - Immediate Decodability | 16585 |
44.02%
|
5160 |
91.36%
|
|
|
|
645 - File Mapping | 1213 |
26.22%
|
419 |
58.71%
|
|
|
|
646 - The Gourmet Club | 523 |
14.53%
|
101 |
32.67%
|
|
|
|
647 - Chutes and Ladders | 1648 |
58.86%
|
944 |
83.69%
|
|
|
|
648 - Stamps (II) | 584 |
31.16%
|
234 |
61.97%
|
|
|
|
649 - You Who? | 223 |
21.08%
|
87 |
36.78%
|
|
|
|
650 - Bowl | 816 |
10.78%
|
250 |
23.20%
|
|
|
|
651 - Deck | 1849 |
52.89%
|
926 |
85.53%
|
|
|
|
652 - Eight | 9274 |
18.89%
|
1165 |
52.70%
|
|
|
|
653 - Gizilch | 1155 |
31.26%
|
339 |
68.14%
|
|
|
|
654 - Ratio | 2391 |
29.82%
|
859 |
64.96%
|
|
|
|
655 - Scrabble | 903 |
10.63%
|
281 |
17.44%
|
|
|
|
656 - Optimal Programs | 2102 |
25.45%
|
565 |
64.25%
|
|
|
|
657 - The die is cast | 17526 |
28.48%
|
3672 |
80.26%
|
|
|
|
658 - It's not a Bug, it's a Feature! | 10061 |
32.13%
|
1440 |
81.74%
|
|
|
|
659 - Reflections | 748 |
35.83%
|
291 |
76.63%
|
|
|
|
660 - Going in circles on Alpha Centauri | 601 |
29.62%
|
212 |
66.51%
|
|
|
|
661 - Blowing Fuses | 24077 |
36.34%
|
7833 |
90.20%
|
|
|
|
662 - Fast Food | 6006 |
30.75%
|
1134 |
81.22%
|
|
|
|
663 - Sorting Slides | 5232 |
21.73%
|
1248 |
58.81%
|
|
|
|
664 - Single-Player Games | 700 |
23.86%
|
191 |
69.63%
|
|
|
|
665 - False coin | 7386 |
29.98%
|
2207 |
73.04%
|
|
|
|
666 - Rating | 426 |
8.45%
|
127 |
24.41%
|
|
|
|
667 - Fence | 620 |
18.23%
|
180 |
46.67%
|
|
|
|
668 - Parliament | 3757 |
28.96%
|
1207 |
67.52%
|
|
|
|
669 - Defragment | 1359 |
24.80%
|
324 |
62.35%
|
|
|
|
670 - The dog task | 8240 |
33.76%
|
1459 |
75.05%
|
|
|
|
671 - Spell checker | 4160 |
24.98%
|
967 |
65.98%
|
|
|
|
672 - Gangsters | 2601 |
25.80%
|
639 |
66.04%
|
|
|
|
673 - Parentheses Balance | 191613 |
27.03%
|
25826 |
80.61%
|
|
|
|
674 - Coin Change | 62664 |
48.36%
|
16206 |
91.53%
|
|
|
|
675 - Convex Hull of the Polygon | 2400 |
13.21%
|
404 |
42.33%
|
|
|
|
676 - Horse Step Maze | 1572 |
11.77%
|
292 |
51.03%
|
|
|
|
677 - All Walks of length "n" from the first node | 5407 |
37.01%
|
1651 |
83.95%
|
|
|
|
678 - Schedule of Taiwan Baseball League | 288 |
28.47%
|
124 |
46.77%
|
|
|
|
679 - Dropping Balls | 37453 |
42.18%
|
7806 |
85.72%
|
|
|
|
680 - Movement of Reading Head | 583 |
36.88%
|
218 |
78.90%
|
|
|
|
681 - Convex Hull Finding | 19214 |
26.55%
|
3142 |
74.95%
|
|
|
|
682 - Whoever-pick-the-last-one-lose | 696 |
32.47%
|
207 |
65.70%
|
|
|
|
683 - Character Decoding | 326 |
23.01%
|
122 |
43.44%
|
|
|
|
684 - Integral Determinant | 4371 |
19.70%
|
702 |
57.83%
|
|
|
|
685 - Least Path Cost | 855 |
32.98%
|
277 |
79.42%
|
|
|
|
686 - Goldbach's Conjecture (II) | 29365 |
56.11%
|
11587 |
93.92%
|
|
|
|
687 - Lattice Practices | 453 |
20.75%
|
99 |
55.56%
|
|
|
|
688 - Mobile Phone Coverage | 3294 |
35.79%
|
944 |
83.47%
|
|
|
|
689 - Napoleon's Grumble | 1333 |
13.13%
|
343 |
38.19%
|
|
|
|
690 - Pipeline Scheduling | 3021 |
33.43%
|
314 |
75.16%
|
|
|
|
691 - Triangle Partition | 1556 |
2.12%
|
133 |
15.04%
|
|
|
|
692 - BUT We Need a Diagram | 482 |
22.82%
|
151 |
55.63%
|
|
|
|
693 - Digital Racing Circuit | 438 |
7.76%
|
62 |
17.74%
|
|
|
|
694 - The Collatz Sequence | 41124 |
40.91%
|
13252 |
89.04%
|
|
|
|
695 - Placing the Ops | 1153 |
35.04%
|
209 |
69.38%
|
|
|
|
696 - How Many Knights | 16927 |
38.74%
|
5059 |
88.97%
|
|
|
|
697 - Jack and Jill | 3855 |
13.83%
|
689 |
40.06%
|
|
|
|
698 - Index | 2408 |
11.63%
|
486 |
31.48%
|
|
|
|
699 - The Falling Leaves | 21554 |
40.72%
|
4328 |
84.40%
|
|
| << Start < Prev 1 Next > End >> | ||
| Display # | Results 1 - 100 of 100 | |