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 | 1475 |
16.81%
|
304 |
34.54%
|
|
|
|
601 - The PATH | 5222 |
29.64%
|
1340 |
73.51%
|
|
|
|
602 - What Day Is It? | 10924 |
25.85%
|
1890 |
65.40%
|
|
|
|
603 - Parking Lot | 3659 |
24.35%
|
964 |
50.73%
|
|
|
|
604 - The Boggle Game | 4595 |
31.08%
|
1005 |
63.88%
|
|
|
605 - The Rotating Disk | 731 |
9.58%
|
127 |
31.50%
|
|
|
|
606 - Keeps Going and Going and ... | 756 |
17.06%
|
260 |
45.77%
|
|
|
|
607 - Scheduling Lectures | 8065 |
27.99%
|
1702 |
66.10%
|
|
|
|
608 - Counterfeit Dollar | 9735 |
35.68%
|
3124 |
78.43%
|
|
|
|
609 - Metal Cutting | 1545 |
19.55%
|
339 |
44.54%
|
|
|
|
610 - Street Directions | 9568 |
41.13%
|
2430 |
83.00%
|
|
|
|
611 - Parallel Deadlock | 494 |
15.99%
|
181 |
34.81%
|
|
|
|
612 - DNA Sorting | 48356 |
24.27%
|
9417 |
68.42%
|
|
|
|
613 - Numbers That Count | 2967 |
23.26%
|
906 |
51.21%
|
|
|
|
614 - Mapping the Route | 3132 |
35.86%
|
1134 |
71.69%
|
|
|
|
615 - Is It A Tree? | 25138 |
22.85%
|
4379 |
67.64%
|
|
|
|
616 - Coconuts, Revisited | 13624 |
29.33%
|
3019 |
72.81%
|
|
|
|
617 - Nonstop Travel | 2728 |
46.41%
|
1234 |
85.58%
|
|
|
|
618 - Doing Windows | 1205 |
27.80%
|
432 |
66.67%
|
|
|
|
619 - Numerically Speaking | 4591 |
49.97%
|
1681 |
86.38%
|
|
|
|
620 - Cellular Structure | 4116 |
53.06%
|
1837 |
86.83%
|
|
|
|
621 - Secret Research | 35853 |
47.16%
|
14369 |
90.14%
|
|
|
|
622 - Grammar Evaluation | 3184 |
25.22%
|
1066 |
59.19%
|
|
|
|
623 - 500! | 50401 |
30.70%
|
12754 |
74.94%
|
|
|
|
624 - CD | 51613 |
46.77%
|
11578 |
89.75%
|
|
|
|
625 - Compression | 1552 |
20.17%
|
407 |
59.21%
|
|
|
|
626 - Ecosystem | 3989 |
42.02%
|
1500 |
84.53%
|
|
|
|
627 - The Net | 7068 |
42.26%
|
2303 |
86.28%
|
|
|
|
628 - Passwords | 12045 |
58.93%
|
3978 |
90.60%
|
|
|
|
629 - Test | 561 |
52.94%
|
191 |
74.35%
|
|
|
|
630 - Anagrams (II) | 8604 |
27.58%
|
2347 |
68.98%
|
|
|
|
631 - Microzoft Calendar | 691 |
19.25%
|
174 |
58.05%
|
|
|
|
632 - Compression (II) | 2925 |
26.09%
|
809 |
71.82%
|
|
|
|
633 - A Chess Knight | 3057 |
22.21%
|
661 |
82.45%
|
|
|
|
634 - Polygon | 5756 |
53.27%
|
1993 |
90.62%
|
|
|
|
635 - Clock solitaire | 487 |
56.26%
|
245 |
83.67%
|
|
|
|
636 - Squares (III) | 4654 |
54.34%
|
2261 |
92.30%
|
|
|
|
637 - Booklet Printing | 10093 |
44.98%
|
4098 |
86.65%
|
|
|
|
638 - Finding Rectangles | 2922 |
37.06%
|
921 |
71.77%
|
|
|
|
639 - Don't Get Rooked | 9534 |
59.67%
|
4066 |
91.76%
|
|
|
|
640 - Self Numbers | 16553 |
50.16%
|
6090 |
89.85%
|
|
|
|
641 - Do the Untwist | 2625 |
65.14%
|
1366 |
91.51%
|
|
|
|
642 - Word Amalgamation | 8692 |
55.44%
|
3720 |
92.23%
|
|
|
|
643 - Bulk Mailing | 700 |
18.71%
|
188 |
50.53%
|
|
|
|
644 - Immediate Decodability | 16627 |
44.04%
|
5176 |
91.34%
|
|
|
|
645 - File Mapping | 1220 |
26.39%
|
422 |
59.24%
|
|
|
|
646 - The Gourmet Club | 589 |
16.64%
|
106 |
43.40%
|
|
|
|
647 - Chutes and Ladders | 1657 |
58.90%
|
951 |
83.60%
|
|
|
|
648 - Stamps (II) | 592 |
31.25%
|
237 |
62.03%
|
|
|
|
649 - You Who? | 226 |
22.12%
|
89 |
39.33%
|
|
|
|
650 - Bowl | 843 |
10.79%
|
254 |
24.02%
|
|
|
|
651 - Deck | 1859 |
53.04%
|
927 |
85.65%
|
|
|
|
652 - Eight | 9472 |
18.89%
|
1176 |
52.81%
|
|
|
|
653 - Gizilch | 1162 |
31.41%
|
345 |
68.12%
|
|
|
|
654 - Ratio | 2397 |
29.95%
|
862 |
64.97%
|
|
|
|
655 - Scrabble | 908 |
11.12%
|
283 |
18.73%
|
|
|
|
656 - Optimal Programs | 2105 |
25.56%
|
566 |
64.31%
|
|
|
|
657 - The die is cast | 17983 |
28.42%
|
3702 |
80.25%
|
|
|
|
658 - It's not a Bug, it's a Feature! | 10129 |
32.32%
|
1449 |
81.85%
|
|
|
|
659 - Reflections | 752 |
36.04%
|
293 |
76.79%
|
|
|
|
660 - Going in circles on Alpha Centauri | 611 |
29.62%
|
217 |
66.36%
|
|
|
|
661 - Blowing Fuses | 24216 |
36.41%
|
7869 |
90.24%
|
|
|
|
662 - Fast Food | 6165 |
30.80%
|
1147 |
81.26%
|
|
|
|
663 - Sorting Slides | 5266 |
21.82%
|
1255 |
58.96%
|
|
|
|
664 - Single-Player Games | 703 |
24.18%
|
194 |
70.10%
|
|
|
|
665 - False coin | 7542 |
30.39%
|
2243 |
73.29%
|
|
|
|
666 - Rating | 437 |
9.61%
|
132 |
27.27%
|
|
|
|
667 - Fence | 627 |
18.66%
|
182 |
48.35%
|
|
|
|
668 - Parliament | 3890 |
29.54%
|
1219 |
67.68%
|
|
|
|
669 - Defragment | 1364 |
25.07%
|
326 |
62.58%
|
|
|
|
670 - The dog task | 8263 |
33.80%
|
1468 |
75.14%
|
|
|
|
671 - Spell checker | 4179 |
25.05%
|
973 |
66.08%
|
|
|
|
672 - Gangsters | 2623 |
26.08%
|
646 |
66.41%
|
|
|
|
673 - Parentheses Balance | 195416 |
27.25%
|
26040 |
80.70%
|
|
|
|
674 - Coin Change | 63984 |
48.64%
|
16338 |
91.55%
|
|
|
|
675 - Convex Hull of the Polygon | 2413 |
13.39%
|
407 |
42.75%
|
|
|
|
676 - Horse Step Maze | 1586 |
11.79%
|
293 |
51.54%
|
|
|
|
677 - All Walks of length "n" from the first node | 5435 |
37.06%
|
1657 |
84.01%
|
|
|
|
678 - Schedule of Taiwan Baseball League | 297 |
28.96%
|
128 |
48.44%
|
|
|
|
679 - Dropping Balls | 37780 |
42.27%
|
7865 |
85.75%
|
|
|
|
680 - Movement of Reading Head | 606 |
38.45%
|
229 |
79.91%
|
|
|
|
681 - Convex Hull Finding | 19431 |
26.45%
|
3150 |
75.05%
|
|
|
|
682 - Whoever-pick-the-last-one-lose | 699 |
32.76%
|
209 |
66.03%
|
|
|
|
683 - Character Decoding | 334 |
23.95%
|
126 |
46.03%
|
|
|
|
684 - Integral Determinant | 4387 |
19.83%
|
709 |
58.11%
|
|
|
|
685 - Least Path Cost | 860 |
33.37%
|
280 |
79.64%
|
|
|
|
686 - Goldbach's Conjecture (II) | 29489 |
56.14%
|
11623 |
93.94%
|
|
|
|
687 - Lattice Practices | 492 |
20.12%
|
106 |
54.72%
|
|
|
|
688 - Mobile Phone Coverage | 3321 |
35.95%
|
948 |
83.54%
|
|
|
|
689 - Napoleon's Grumble | 1335 |
13.26%
|
344 |
38.66%
|
|
|
|
690 - Pipeline Scheduling | 3069 |
33.37%
|
321 |
75.39%
|
|
|
|
691 - Triangle Partition | 1625 |
2.77%
|
142 |
18.31%
|
|
|
|
692 - BUT We Need a Diagram | 514 |
23.74%
|
161 |
57.76%
|
|
|
|
693 - Digital Racing Circuit | 478 |
8.37%
|
68 |
23.53%
|
|
|
|
694 - The Collatz Sequence | 41313 |
40.94%
|
13269 |
89.06%
|
|
|
|
695 - Placing the Ops | 1162 |
35.37%
|
215 |
69.77%
|
|
|
|
696 - How Many Knights | 17182 |
38.68%
|
5098 |
88.98%
|
|
|
|
697 - Jack and Jill | 3936 |
14.13%
|
696 |
40.23%
|
|
|
|
698 - Index | 2451 |
11.63%
|
488 |
31.76%
|
|
|
|
699 - The Falling Leaves | 21835 |
40.78%
|
4343 |
84.43%
|
|
| << Start < Prev 1 Next > End >> | ||
| Display # | Results 1 - 100 of 100 | |