check digit of CAS registration number
Submit
Language is selected by the extension of the file. See the list of supported languages to know the extension of your language.
Problem
calculate the rightmost digit of a CAS (Chemical Abstracts Service) registry number
Options
exec is denied
rejudge feature is enabled
now post-mortem time, all source codes will be revealed
Sample input:_
79-06-
79-10-
140-88-
107-13-
75-07-
90-04-
18854-01-
26087-47-
75-21-
106-89-
75-56-
7647-01-
1897-45-
75-01-
7782-50-
105-60-
1330-20-
95-47-
108-38-
106-42-
120-71-
5598-13-
76-06-
122-34-
126-99-
28249-77-
67-66-
107-30-
13356-08-
101-77-
50512-35-
333-41-
298-04-
56-23-
123-91-
107-06-
75-35-
101-14-
78-87-
542-75-
75-27-
106-46-
75-09-
85-00-
156-59-
121-14-
101-68-
106-93-
57-14-
68-12-
122-14-
74-83-
144-62-
100-42-
2921-88-
127-18-
156-60-
71-55-
79-00-
79-01-
1836-77-
1582-09-
95-53-
108-88-
91-23-
137-26-
1910-42-
302-01-
2104-64-
55-38-
106-99-
117-81-
7664-39-
7782-41-
23950-58-
114-26-
71-43-
115-29-
82-68-
87-86-
50-00-
121-75-
3766-81-
74-93-
7553-56-
62-73-
124-04-
103-23-
103-33-
62-53-
107-18-
78-79-
80-05-
141-43-
2212-67-
100-41-
110-80-
80844-07-
133-06-
63-25-
91-22-
107-22-
123-73-
106-47-
109-70-
74-87-
111-15-
108-05-
94-75-
98-87-
60-51-
97-02-
92-52-
122-39-
128-37-
124-40-
131-11-
409-21-
109-99-
100-21-
108-77-
75-50-
98-95-
25154-52-
123-31-
111-44-
27355-22-
84-69-
84-74-
98-01-
314-40-
41814-78-
124-09-
100-44-
115-77-
8018-01-
16752-77-
563-47-
950-37-
74-89-
60-34-
74-88-
126-73-
Sample output:
1
7
5
1
0
0
8
8
8
8
9
0
6
4
5
2
7
6
3
3
8
0
2
9
8
6
3
2
6
9
1
5
4
5
1
2
4
4
5
6
4
7
2
7
2
2
8
4
7
2
5
9
7
5
2
4
5
6
5
6
7
8
4
3
6
8
5
2
5
9
0
7
3
4
5
1
2
7
8
5
0
5
2
1
2
7
9
1
3
3
6
5
7
5
1
4
5
1
2
2
5
2
9
8
6
3
9
4
7
3
5
9
4
4
0
3
3
2
9
0
0
3
3
3
9
4
2
5
2
1
9
2
4
7
5
7
5
3
8
5
4
4
8
Ranking
| Rank | User | Size | Time | Date | Statistics |
|---|
| 1 | tails | 40 | 0.0179 | 2025/09/12 13:19:54 | 0B / 17B / 23B |
| 2 | teebee | 40 | 0.0477 | 2025/09/14 18:39:55 | 0B / 14B / 24B |
| Rank | User | Size | Time | Date | Statistics |
|---|
| 1 | xnor | 68 | 0.0535 | 2025/09/16 21:58:25 | 0B / 39B / 28B |
| 2 | i6ha | 80 | 0.1555 | 2025/09/15 00:10:58 | 0B / 41B / 29B |
| 3 | olf | 87 | 0.0492 | 2025/09/12 23:08:28 | 0B / 46B / 28B |
| 4 | hyacinth | 88 | 0.0445 | 2025/09/12 22:49:52 | 0B / 52B / 32B |
| 5 | cldemote | 114 | 0.0483 | 2025/09/18 10:46:41 | 0B / 69B / 35B |
| Rank | User | Size | Time | Date | Statistics |
|---|
| 1 | teebee | 65 | 0.0253 | 2025/09/14 17:59:53 | 0B / 40B / 22B |
| 2 | KrausRaus | 75 | 0.0252 | 2025/09/13 23:57:41 | 0B / 43B / 32B |
| Rank | User | Size | Time | Date | Statistics |
|---|
| 1 | tails | 11 | 0.0382 | 2025/09/18 08:56:24 | 0B / 6B / 5B |
| Rank | User | Size | Time | Date | Statistics |
|---|
| 1 | rotary-o | 69 | 0.1330 | 2025/09/14 20:55:22 | 0B / 38B / 31B |
| 2 | tails | 69 | 0.1330 | 2025/09/17 10:02:07 | 0B / 38B / 31B |
| Rank | User | Size | Time | Date | Statistics |
|---|
| 1 | Fleur | 44 | 0.0142 | 2025/09/12 23:41:19 | 0B / 16B / 28B |
| 2 | olf | 50 | 0.0143 | 2025/09/16 21:32:56 | 0B / 22B / 28B |
| Rank | User | Size | Time | Date | Statistics |
|---|
| 1 | tails | 97 | 0.0495 | 2025/09/14 01:21:46 | 0B / 26B / 61B |
| 2 | McBusLuck | 104 | 0.0473 | 2025/09/13 21:02:04 | 0B / 43B / 50B |
| Rank | User | Size | Time | Date | Statistics |
|---|
| 1 | tails | 54 | 0.3713 | 2025/09/14 00:14:18 | 0B / 19B / 32B |
| 2 | McBusLuck | 55 | 0.3826 | 2025/09/13 06:49:32 | 0B / 20B / 32B |
| Rank | User | Size | Time | Date | Statistics |
|---|
| 1 | ludo | 76 | 0.0218 | 2025/09/18 21:21:55 | 0B / 41B / 34B |
| 2 | teebee | 73 | 0.0100 | 2025/09/20 03:11:26 | 0B / 40B / 32B |
| Rank | User | Size | Time | Date | Statistics |
|---|
| 1 | ludo | 63 | 0.3075 | 2025/09/18 20:25:48 | 0B / 31B / 32B |
| 2 | olf | 73 | 0.1301 | 2025/09/15 21:15:04 | 0B / 39B / 32B |
| 3 | teebee | 76 | 0.1310 | 2025/09/15 04:57:47 | 0B / 47B / 27B |
| Rank | User | Size | Time | Date | Statistics |
|---|
| 1 | tails | 27 | 0.0653 | 2025/09/17 11:42:40 | 0B / 6B / 21B |
| Rank | User | Size | Time | Date | Statistics |
|---|
| 1 | tails | 9 | 0.0810 | 2025/09/12 13:29:35 | 4B / 5B / 0B |
| 2 | whio | 9 | 0.1327 | 2025/09/18 12:55:16 | 3B / 4B / 2B |
| Rank | User | Size | Time | Date | Statistics |
|---|
| 1 | tails | 9 | 0.0380 | 2025/09/17 11:24:00 | 7B / 1B / 1B |
| 2 | whio | 9 | 0.0215 | 2025/09/18 13:07:43 | 8B / 1B / 0B |
| Rank | User | Size | Time | Date | Statistics |
|---|
| 1 | tails | 729 | 0.1329 | 2025/09/12 14:31:42 | 0B / 396B / 333B |
Language Ranking_
| Rank | Lang | User | Size | Score |
| 1 | gs2 | tails | 9 | 10000 |
| 2 | Nibbles | tails | 9 | 10000 |
| 3 | iogii | tails | 11 | 8181 |
| 4 | GolfScript | tails | 27 | 3333 |
| 5 | K | teebee | 30 | 3000 |
| 6 | Perl | tails | 40 | 2250 |
| 7 | AWK | Fleur | 44 | 2045 |
| 8 | Ruby2 | rotary-o | 47 | 1914 |
| 9 | Ruby | rotary-o | 47 | 1914 |
| 10 | jq | teebee | 48 | 1875 |
| 11 | Bash (builtins) | tails | 54 | 1666 |
| 12 | Scala | rotary-o | 63 | 1428 |
| 13 | R | ludo | 63 | 1428 |
| 14 | JavaScript | teebee | 65 | 1384 |
| 15 | Python3 | xnor | 68 | 1323 |
| 16 | C | rotary-o | 69 | 1304 |
| 17 | bc | teebee | 73 | 1232 |
| 18 | sed | tails | 97 | 927 |
| 19 | Whitespace | rotary-o | 127 | 708 |
| 20 | Java | rotary-o | 129 | 697 |
| 21 | C# | rotary-o | 133 | 676 |
| 22 | Lazy-K | tails | 729 | 123 |
return to the top page