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Challenges The 50 substrings that validate any string of Roman numerals

Python, 344 bytes 534 bytes: This is not golfed in any way. But it's the current winner! def validate_roman_numeral(candidate): invalid_strings = ["CCCC", "CCD", "CCM", "CDC", "CMC", "CMD",...

posted 8mo ago by daviewales‭  ·  edited 5mo ago by daviewales‭

Answer
#5: Post edited by user avatar daviewales‭ · 2024-07-09T04:00:58Z (5 months ago)
  • # [Python](https://python.org), 344 bytes
  • **534 bytes**:
  • This is _not_ golfed in any way. But it's the current winner!
  • ``` python
  • def validate_roman_numeral(candidate):
  • invalid_strings = ["CCCC", "CCD", "CCM", "CDC", "CMC", "CMD", "CMM", "DCD", "DCM", "DD", "DM", "IC", "ID", "IIII", "IIV", "IIX", "IL", "IM", "IVI", "IXC", "IXI", "IXL", "IXV", "IXX", "LC", "LD", "LL", "LM", "LXC", "LXL", "MMMM", "VC", "VD", "VIV", "VIX", "VL", "VM", "VV", "VX", "XCC", "XCD", "XCL", "XCM", "XCX", "XD", "XLX", "XM", "XXC", "XXL", "XXXX"]
  • for invalid_string in invalid_strings:
  • if invalid_string in candidate:
  • return invalid_string
  • return "VALID"
  • ```
  • **379 bytes**:
  • Here's a minimal effort golf of the above:
  • ``` python
  • def v(c):
  • i=['DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','CCCC','IIII','MMMM','XXXX']
  • for s in i:
  • if s in c:
  • return s
  • return "VALID"
  • ```
  • **344 bytes**:
  • A little more effort:
  • ``` python
  • def v(c):
  • o="VALID"
  • for s in 'DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','C'*4,'I'*4,'M'*4,'X'*4:
  • if s in c:
  • o=s
  • return o
  • ```
  • # [Python](https://python.org), 344 bytes
  • **534 bytes**:
  • This is _not_ golfed in any way. ~~But it's the current winner!~~
  • ``` python
  • def validate_roman_numeral(candidate):
  • invalid_strings = ["CCCC", "CCD", "CCM", "CDC", "CMC", "CMD", "CMM", "DCD", "DCM", "DD", "DM", "IC", "ID", "IIII", "IIV", "IIX", "IL", "IM", "IVI", "IXC", "IXI", "IXL", "IXV", "IXX", "LC", "LD", "LL", "LM", "LXC", "LXL", "MMMM", "VC", "VD", "VIV", "VIX", "VL", "VM", "VV", "VX", "XCC", "XCD", "XCL", "XCM", "XCX", "XD", "XLX", "XM", "XXC", "XXL", "XXXX"]
  • for invalid_string in invalid_strings:
  • if invalid_string in candidate:
  • return invalid_string
  • return "VALID"
  • ```
  • **379 bytes**:
  • Here's a minimal effort golf of the above:
  • ``` python
  • def v(c):
  • i=['DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','CCCC','IIII','MMMM','XXXX']
  • for s in i:
  • if s in c:
  • return s
  • return "VALID"
  • ```
  • **344 bytes**:
  • A little more effort:
  • ``` python
  • def v(c):
  • o="VALID"
  • for s in 'DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','C'*4,'I'*4,'M'*4,'X'*4:
  • if s in c:
  • o=s
  • return o
  • ```
#4: Post edited by user avatar trichoplax‭ · 2024-06-28T16:36:12Z (5 months ago)
Fix heading so that the leaderboard picks up the language correctly
  • # [Python](https://python.org) (344 bytes)
  • **534 bytes**:
  • This is _not_ golfed in any way. But it's the current winner!
  • ``` python
  • def validate_roman_numeral(candidate):
  • invalid_strings = ["CCCC", "CCD", "CCM", "CDC", "CMC", "CMD", "CMM", "DCD", "DCM", "DD", "DM", "IC", "ID", "IIII", "IIV", "IIX", "IL", "IM", "IVI", "IXC", "IXI", "IXL", "IXV", "IXX", "LC", "LD", "LL", "LM", "LXC", "LXL", "MMMM", "VC", "VD", "VIV", "VIX", "VL", "VM", "VV", "VX", "XCC", "XCD", "XCL", "XCM", "XCX", "XD", "XLX", "XM", "XXC", "XXL", "XXXX"]
  • for invalid_string in invalid_strings:
  • if invalid_string in candidate:
  • return invalid_string
  • return "VALID"
  • ```
  • **379 bytes**:
  • Here's a minimal effort golf of the above:
  • ``` python
  • def v(c):
  • i=['DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','CCCC','IIII','MMMM','XXXX']
  • for s in i:
  • if s in c:
  • return s
  • return "VALID"
  • ```
  • **344 bytes**:
  • A little more effort:
  • ``` python
  • def v(c):
  • o="VALID"
  • for s in 'DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','C'*4,'I'*4,'M'*4,'X'*4:
  • if s in c:
  • o=s
  • return o
  • ```
  • # [Python](https://python.org), 344 bytes
  • **534 bytes**:
  • This is _not_ golfed in any way. But it's the current winner!
  • ``` python
  • def validate_roman_numeral(candidate):
  • invalid_strings = ["CCCC", "CCD", "CCM", "CDC", "CMC", "CMD", "CMM", "DCD", "DCM", "DD", "DM", "IC", "ID", "IIII", "IIV", "IIX", "IL", "IM", "IVI", "IXC", "IXI", "IXL", "IXV", "IXX", "LC", "LD", "LL", "LM", "LXC", "LXL", "MMMM", "VC", "VD", "VIV", "VIX", "VL", "VM", "VV", "VX", "XCC", "XCD", "XCL", "XCM", "XCX", "XD", "XLX", "XM", "XXC", "XXL", "XXXX"]
  • for invalid_string in invalid_strings:
  • if invalid_string in candidate:
  • return invalid_string
  • return "VALID"
  • ```
  • **379 bytes**:
  • Here's a minimal effort golf of the above:
  • ``` python
  • def v(c):
  • i=['DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','CCCC','IIII','MMMM','XXXX']
  • for s in i:
  • if s in c:
  • return s
  • return "VALID"
  • ```
  • **344 bytes**:
  • A little more effort:
  • ``` python
  • def v(c):
  • o="VALID"
  • for s in 'DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','C'*4,'I'*4,'M'*4,'X'*4:
  • if s in c:
  • o=s
  • return o
  • ```
#3: Post edited by user avatar daviewales‭ · 2024-03-18T12:19:28Z (8 months ago)
  • **534 bytes**:
  • This is _not_ golfed in any way. But it's the current winner!
  • ``` python
  • def validate_roman_numeral(candidate):
  • invalid_strings = ["CCCC", "CCD", "CCM", "CDC", "CMC", "CMD", "CMM", "DCD", "DCM", "DD", "DM", "IC", "ID", "IIII", "IIV", "IIX", "IL", "IM", "IVI", "IXC", "IXI", "IXL", "IXV", "IXX", "LC", "LD", "LL", "LM", "LXC", "LXL", "MMMM", "VC", "VD", "VIV", "VIX", "VL", "VM", "VV", "VX", "XCC", "XCD", "XCL", "XCM", "XCX", "XD", "XLX", "XM", "XXC", "XXL", "XXXX"]
  • for invalid_string in invalid_strings:
  • if invalid_string in candidate:
  • return invalid_string
  • return "VALID"
  • ```
  • **379 bytes**:
  • Here's a minimal effort golf of the above:
  • ``` python
  • def v(c):
  • i=['DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','CCCC','IIII','MMMM','XXXX']
  • for s in i:
  • if s in c:
  • return s
  • return "VALID"
  • ```
  • **344 bytes**:
  • A little more effort:
  • ``` python
  • def v(c):
  • o="VALID"
  • for s in 'DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','C'*4,'I'*4,'M'*4,'X'*4:
  • if s in c:
  • o=s
  • return o
  • ```
  • # [Python](https://python.org) (344 bytes)
  • **534 bytes**:
  • This is _not_ golfed in any way. But it's the current winner!
  • ``` python
  • def validate_roman_numeral(candidate):
  • invalid_strings = ["CCCC", "CCD", "CCM", "CDC", "CMC", "CMD", "CMM", "DCD", "DCM", "DD", "DM", "IC", "ID", "IIII", "IIV", "IIX", "IL", "IM", "IVI", "IXC", "IXI", "IXL", "IXV", "IXX", "LC", "LD", "LL", "LM", "LXC", "LXL", "MMMM", "VC", "VD", "VIV", "VIX", "VL", "VM", "VV", "VX", "XCC", "XCD", "XCL", "XCM", "XCX", "XD", "XLX", "XM", "XXC", "XXL", "XXXX"]
  • for invalid_string in invalid_strings:
  • if invalid_string in candidate:
  • return invalid_string
  • return "VALID"
  • ```
  • **379 bytes**:
  • Here's a minimal effort golf of the above:
  • ``` python
  • def v(c):
  • i=['DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','CCCC','IIII','MMMM','XXXX']
  • for s in i:
  • if s in c:
  • return s
  • return "VALID"
  • ```
  • **344 bytes**:
  • A little more effort:
  • ``` python
  • def v(c):
  • o="VALID"
  • for s in 'DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','C'*4,'I'*4,'M'*4,'X'*4:
  • if s in c:
  • o=s
  • return o
  • ```
#2: Post edited by user avatar daviewales‭ · 2024-03-18T12:15:19Z (8 months ago)
  • **534 bytes**:
  • This is _not_ golfed in any way. But it's the current winner!
  • ``` python
  • def validate_roman_numeral(candidate):
  • invalid_strings = ["CCCC", "CCD", "CCM", "CDC", "CMC", "CMD", "CMM", "DCD", "DCM", "DD", "DM", "IC", "ID", "IIII", "IIV", "IIX", "IL", "IM", "IVI", "IXC", "IXI", "IXL", "IXV", "IXX", "LC", "LD", "LL", "LM", "LXC", "LXL", "MMMM", "VC", "VD", "VIV", "VIX", "VL", "VM", "VV", "VX", "XCC", "XCD", "XCL", "XCM", "XCX", "XD", "XLX", "XM", "XXC", "XXL", "XXXX"]
  • for invalid_string in invalid_strings:
  • if invalid_string in candidate:
  • return invalid_string
  • return "VALID"
  • ```
  • **375 bytes**:
  • Here's a minimal effort golf of the above:
  • ``` python
  • def v(c):
  • i=['DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','CCCC','IIII','MMMM','XXXX']
  • for s in i:
  • if s in c:
  • return s
  • return "VALID"
  • ```
  • **534 bytes**:
  • This is _not_ golfed in any way. But it's the current winner!
  • ``` python
  • def validate_roman_numeral(candidate):
  • invalid_strings = ["CCCC", "CCD", "CCM", "CDC", "CMC", "CMD", "CMM", "DCD", "DCM", "DD", "DM", "IC", "ID", "IIII", "IIV", "IIX", "IL", "IM", "IVI", "IXC", "IXI", "IXL", "IXV", "IXX", "LC", "LD", "LL", "LM", "LXC", "LXL", "MMMM", "VC", "VD", "VIV", "VIX", "VL", "VM", "VV", "VX", "XCC", "XCD", "XCL", "XCM", "XCX", "XD", "XLX", "XM", "XXC", "XXL", "XXXX"]
  • for invalid_string in invalid_strings:
  • if invalid_string in candidate:
  • return invalid_string
  • return "VALID"
  • ```
  • **379 bytes**:
  • Here's a minimal effort golf of the above:
  • ``` python
  • def v(c):
  • i=['DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','CCCC','IIII','MMMM','XXXX']
  • for s in i:
  • if s in c:
  • return s
  • return "VALID"
  • ```
  • **344 bytes**:
  • A little more effort:
  • ``` python
  • def v(c):
  • o="VALID"
  • for s in 'DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','C'*4,'I'*4,'M'*4,'X'*4:
  • if s in c:
  • o=s
  • return o
  • ```
#1: Initial revision by user avatar daviewales‭ · 2024-03-18T12:01:15Z (8 months ago) 
**534 bytes**:

This is _not_ golfed in any way. But it's the current winner!

``` python
def validate_roman_numeral(candidate):
    invalid_strings = ["CCCC", "CCD", "CCM", "CDC", "CMC", "CMD", "CMM", "DCD", "DCM", "DD", "DM", "IC", "ID", "IIII", "IIV", "IIX", "IL", "IM", "IVI", "IXC", "IXI", "IXL", "IXV", "IXX", "LC", "LD", "LL", "LM", "LXC", "LXL", "MMMM", "VC", "VD", "VIV", "VIX", "VL", "VM", "VV", "VX", "XCC", "XCD", "XCL", "XCM", "XCX", "XD", "XLX", "XM", "XXC", "XXL", "XXXX"]
    for invalid_string in invalid_strings:
        if invalid_string in candidate:
            return invalid_string
    return "VALID"
```

**375 bytes**:
Here's a minimal effort golf of the above:

``` python
def v(c):
i=['DD','DM','IC','ID','IL','IM','LC','LD','LL','LM','VC','VD','VL','VM','VV','VX','XD','XM','CCD','CCM','CDC','CMC','CMD','CMM','DCD','DCM','IIV','IIX','IVI','IXC','IXI','IXL','IXV','IXX','LXC','LXL','VIV','VIX','XCC','XCD','XCL','XCM','XCX','XLX','XXC','XXL','CCCC','IIII','MMMM','XXXX']
    for s in i:
        if s in c:
            return s
    return "VALID"
```