| Source file | Python version | Characters with line endings | Characters without line endings | Comments |
|---|---|---|---|---|
| collatz.py | 3.8 | 103 | 98 | Range [1, 100000] |
| collatz2.py | 3.8 | 108 | 107 | Range [1, 100000] |
| collatz-python2.py | 2.7 | 102 | 97 | Range [1, 100000] |
| collatz2-python2.py | 2.7 | 107 | 106 | Range [1, 100000] |
| collatz3-python2.py | 2.7 | 99 | 94 | Range [1, 100000] |
| collatz4-python2.py | 2.7 | 97 | 🔝🙌 92 🙌🔝 | Range [0, 100000] |
If collatz4-python2.py program is written in the Python Command Line, the print command can be avoided, writting only _. Obtaining 86 characters without line endings:
a=_=0
for n in range(100001):
c,N=1,n
while n>1:n=(n/2,n*3+1)[n%2];c+=1
if c>a:a,_=c,N
_
Update With the [a-zA-Z0-9]* character count. There are 41 characters for PCL (python 2.7):
a=s=0
for _ in range(10**5+1):
c,N=1,_
while _>1:_=(_/2,_*3+1)[_%2];c+=1
if c>a:a,s=c,N
s
29 characters with PCL and range [1, 100000] (python 2.7):
a=s=(""!="")
for _ in range((""==""),(((""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""==""))**((""=="")+(""=="")+(""=="")+(""=="")+(""==""))+(""==""))):
c,N=(""==""),_
while _>(""==""):_=(_/((""=="")+(""=="")),_*((""=="")+(""=="")+(""==""))+(""==""))[_%((""=="")+(""==""))];c+=(""=="")
if c>a:a,s=c,N
s
17 characters with PCL and range [1, 100000] (python 2.7):
__=___=(""!="")
for _ in range((""==""),(((""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""==""))**((""=="")+(""=="")+(""=="")+(""=="")+(""==""))+(""==""))):
____,_____=(""==""),_
while _>(""==""):_=(_/((""=="")+(""=="")),_*((""=="")+(""=="")+(""==""))+(""==""))[_%((""=="")+(""==""))];____+=(""=="")
if ____>__:__,___=____,_____
___
15 characters with PCL and range [1, 100000] (python 2.7):
__=___=(""!="")
for _ in range((""==""),(((""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""=="")+(""==""))**((""=="")+(""=="")+(""=="")+(""=="")+(""==""))+(""==""))):
____,_____=(""==""),_
while _>(""==""):_=(_/((""=="")+(""=="")),_*((""=="")+(""=="")+(""==""))+(""==""))[_%((""=="")+(""==""))];____+=(""=="")
__,___=((__,___),(____,_____))[____>__]
___
10 characters writing collatz_underscore_pcl_4.py in PCL and range [1, 100000] (python 3.8). Only words for, in and while, added ~- and -~ operations to avoid n!=1 and c+=1, changed //2 to >>1:
_=''=='';__=_+_;___=__+_;____=___+_;_____=____+_;______=_____+_;_______=______+_;________=_______+_;_________=________+_;__________=_________+_;______________=~-_
___________ = [ ...avoided, check full file... ]
____________=_____________=______________
for ______________ in ___________:
_______________,________________=_,______________
while ~-______________:______________=(______________>>_,______________*___+_)[______________%__];_______________=-~_______________
____________,_____________=((____________,_____________),(_______________,________________))[_______________>____________]
_____________Better minimum implementation, 15 characters, print and two times while:
_=__=()!=[];____=_____=~-_
while __<(((-~-~_+-~_)*-~_)**(-~-~_+-~_)+_):
___,______=_,__
while ~-__:(__,___)=((__>>_,-~___),(__*-~-~_+_,-~___))[__%-~_]
____,_____,__=((____,_____,-~______),(___,______,-~______))[___>____]
print(_____)Just the calculation, 10 characters, two times while:
_=__=()!=[];____=_____=~-_
while __<(((-~-~_+-~_)*-~_)**(-~-~_+-~_)+_):
___,______=_,__
while ~-__:(__,___)=((__>>_,-~___),(__*-~-~_+_,-~___))[__%-~_]
____,_____,__=((____,_____,-~______),(___,______,-~______))[___>____]Just the calculation in Chinese Python, 0 characters, while is 當:
_=__=()!=[];____=_____=~-_
當 __<(((-~-~_+-~_)*-~_)**(-~-~_+-~_)+_):
___,______=_,__
當 ~-__:(__,___)=((__>>_,-~___),(__*-~-~_+_,-~___))[__%-~_]
____,_____,__=((____,_____,-~______),(___,______,-~______))[___>____]
The same but with Chinese print 印出, 0 characters:
_=__=()!=[];____=_____=~-_
當 __<(((-~-~_+-~_)*-~_)**(-~-~_+-~_)+_):
___,______=_,__
當 ~-__:(__,___)=((__>>_,-~___),(__*-~-~_+_,-~___))[__%-~_]
____,_____,__=((____,_____,-~______),(___,______,-~______))[___>____]
印出 _____
An alternative use of tupple unpacking with list addition:
_=__=()!=[];____=_____=~-_
while __<(((-~-~_+-~_)*-~_)**(-~-~_+-~_)+_):
___,______=_,__
while ~-__:__,___=[(__>>_,__*-~-~_+_)[__%-~_]]+[-~___]
____,_____,__=([____,_____],[___,______])[___>____]+[-~______]
print(_____)Only one while version. Readable version
_=n=c=N=()!=[];b=s=~-_
while N<=(((-~-~_+-~_)*-~_)**(-~-~_+-~_)):n,N,c,b,s=[-~_*[-~N]+[_]+[[b,s],[c,N]][c>b],[[n>>_],[n*-~-~_+_]][n%-~_]+[N,-~c,b,s]][n>_]
print(s)Only one while version. 5 characters
_=__=___=_____=()!=[];______=_______=~-_
while _____<=(((-~-~_+-~_)*-~_)**(-~-~_+-~_)):__,_____,___,______,_______=[-~_*[-~_____]+[_]+[[______,_______],[___,_____]][___>______],[[__>>_],[__*-~-~_+_]][__%-~_]+[_____,-~___,______,_______]][__>_]Chinese version. 0 characters
_=__=___=_____=()!=[];______=_______=~-_
當 _____<=(((-~-~_+-~_)*-~_)**(-~-~_+-~_)):__,_____,___,______,_______=[-~_*[-~_____]+[_]+[[______,_______],[___,_____]][___>______],[[__>>_],[__*-~-~_+_]][__%-~_]+[_____,-~___,______,_______]][__>_]
印出 _______
Chinese version, only calc. 0 characters
_=__=___=_____=()!=[];______=_______=~-_
當 _____<=(((-~-~_+-~_)*-~_)**(-~-~_+-~_)):__,_____,___,______,_______=[-~_*[-~_____]+[_]+[[______,_______],[___,_____]][___>______],[[__>>_],[__*-~-~_+_]][__%-~_]+[_____,-~___,______,_______]][__>_]
Extra version using a list and all numbers are made on-the-fly
_=[()!=[]]*-~-~-~(()!=[])+[()==[]]*-~([]!=())
while _[-~-~(()!=[])]<=((-~-~(()!=[])+-~(()!=[]))*-~(()!=[]))**(-~-~(()!=[])+-~(()!=[])):_[()!=[]],_[-~-~(()!=[])],_[-~(()!=[])],_[-~-~-~(()!=[])],_[-~-~-~-~(()!=[])]=[-~(()!=[])*[-~_[-~-~(()!=[])]]+[()!=[]]+[[_[-~-~-~(()!=[])],_[-~-~-~-~(()!=[])]],[_[-~(()!=[])],_[-~-~(()!=[])]]][_[-~(()!=[])]>_[-~-~-~(()!=[])]],[[_[()!=[]]>>(()!=[])],[_[()!=[]]*-~-~(()!=[])+(()!=[])]][_[()!=[]]%-~(()!=[])]+[_[-~-~(()!=[])],-~_[-~(()!=[])],_[-~-~-~(()!=[])],_[-~-~-~-~(()!=[])]]][_[()!=[]]>(()!=[])]
print(_[-~-~-~-~(()!=[])])