পাইথন 3370
আমি এটি যতটা পারি ততটা কার্যকরী হতে পেরেছি এমনকি কাজের জন্য বিকল্পও পেয়েছি (সঠিক ডাবল-কাউন্ট পরীক্ষা করে!)! যতদূর আমি জানি এটি লুকোচুরি ব্যতীত সমস্ত কিছুর জন্য কাজ করে (কারণ এটি পাগল হবে)।
যে কেউ নিজের সমাধান লিখছেন তাদের পক্ষে আমার পদ্ধতিগুলি আপনার পছন্দমতো ব্যবহার / উন্নত করতে নির্দ্বিধায় হন
কোড:
R=range;L=len;E=enumerate;I=int;F="Infinity";S=sum;H=chr;D=ord;J=lambda l:''.join(l);U=lambda s:J([H(i)if H(i) not in s else''for i in R(1,128)]);s=' \n\t';c=J((H(i)if H(i)not in s else'')for i in R(1,32));d,l,u=[J(H(i)for i in R(*n))for n in [[48,59],[97,123],[65,91]]];p='`~!@#$%^&*()-_=+[{]}\\|;:\'",<.>/?';Y={'\\s':s,'\\S':c+s+p+u+l+d,'\\d':d,'\\D':U(d),'\\w':u+l+'_','\\W':U(u+l+'_'),'[:alnum:]':u+l+d,'[:alpha:]':u+l,'[:ascii:]':U(''),'[:blank:]':' \t','[:cntrl:]':c,'[:digit:]':d,'[:graph:]':p+d+l+u,'[:lower:]':l,'[:print:]':p+d+l+u+s,'[:punct:]':p,'[:space:]':s,'[:upper:]':u,'[:word:]':l+u+'_','[:xdigit:]':d+'ABCDEF'};C=lambda l,n:[d+[l[i]]for i in R(L(l))for d in C(l[i+1:],n-1)]if n>0 else[[]];O=lambda x:S([all((c in s)for s in [(e[1]if any(e[1] not in Y for e in x)else Y[e[1]])if e[0]=='e'else(e[1]if e[0]=='t'else((Y[e[1]]if e[1]in Y else B(e[1]))if e[0]=='['else''))for e in x])for c in Y['[:ascii:]']])
def X(r):
x=[];l=0;c=''
for h in r:
l+=I(h in'([')-I(h in')]')
if l<1 and'|'==h:x+=[c];c=''
else:c+=h
x+=[c]
if L(x)>1:
o=0;m=[];u=[]
for e in x:
p,b=X(e)
if p==F:return F,[]
o+=p;m+=[('(',b)];u+=[b]
return o-S([(-1)**(i%2)*T(s) for i in R(2,L(u)+1)for s in C(u,i)]),[('|',m)]
u=[];o=[];m=[];w=1
while r!='':
h=r[0];z=0
if h in'([{':
l=1;i=1
while l>0:k=r[i];l+=(k==h)-(k=={'(':')','[':']','{':'}'}[h]);i+=1
u+=[(h,r[1:i-1])];z=i
elif h=='\\':u+=[('e','\\'+eval("'\\%s'"%r[1]))]if r[1]in'nt'else[('e','\\'+r[1])];z=2
elif h in ['*','+','?']:u+=[('{',h)];z=1
elif h in'^$':return 0
elif h=='.':u+=[('[','[:ascii:]')];z=1
else:u+=[('t',h)];z=1
r=r[z:]
for t,g in u:
if t=='(':p,b=X(g);o+=[p];m+=[('(',b)]
elif t=='e':o+=[L(Y[g])]if g in Y else[1]
elif t=='[':o+=[N(g)]
elif t=='{':
n=o[-1]
try:o[-1]=S([n**r for r in Q(g)])
except:return F,[]
elif t=='t':o+=[1]
if t!='(':m+=[(t,g)]
for c in o:
if c==F:return F,[]
w*=c
return w,m
def N(s):
if s in Y:return L(Y[s])
if(s[0],s[-1])==('[',']'):return 1
n=(s[0]=='^');a=0
if n:s=s[1:]
while s!='':
if L(s)>=3 and s[1]=='-':a+=D(s[2])-D(s[0])+1;s=s[3:];continue
a+=1;s=s[1:]
return 256*n+(-1)**n*a
def Q(s):
if s=='?':return[0,1]
if s[0]in'*+':return None
if ','in s:
l,h=s.split(',')
return None if h==''else R(I(l),I(h)+1)
return[I(s)]
def B(s):
n=(s[0]=='^')
if n:s=s[1:]
a='';w=''
while s!='':
h=s[0]
if 3<=L(s)and'-'==s[1]:
for i in R(D(s[0]),D(s[2])+1):a+=H(i)
s=s[3:];continue
a+=h;s=s[1:]
return J([c*(c not in a)for c in Y['[:ascii:]']])if n else a
def T(x):
if all(e==[] for e in x):return 1
for i,e in E(x):
if L(e)>=2 and e[1][0]=='{':return S([T([[e[0]]*n+e[2:]]+x[:i]+x[i+1:])for n in Q(e[1][1])])
if L(e)>=1:
if e[0][0] == '(':return T([e[0][1]+e[1:]]+x[:i]+x[i+1:])
if e[0][0]== '|':
t=S(T([[s]+e[1:]]+x[:i]+x[i+1:])for s in e[0][1])
u=[[s]for s in e[0][1]]
return t-S((-1)**(j%2)*T(b)for j in R(2,L(u)+1)for b in C(u,j))
if any(e==[]for e in x):return 0
return O([e[0]for e in x])*T([e[1:]for e in x])
r=raw_input();e=[];l=0;c=''
for h in r:
l+=I(h in'([')-I(h in')]')
if l<1 and'|'==h:e+=[c];c=''
else:c+=h
e+=[c];o=[];x=[]
for f in e:
if '^'!=f[0]or'$'!=f[-1]:print F;quit()
n,m=X(f[1:-1])
if n==F:print F;quit()
o+=[n];x+=[m]
print S(o)-S([(-1)**(i%2)*T(s) for i in R(2,L(x)+1)for s in C(x,i)])
Ungolfed:
controlchars = ''
for i in range(1,32):
if chr(i) not in '\t\n':
controlchars += chr(i)
CLASSES={
'\\s':' \t\n',
'\\S':controlchars+'!"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~',
'\\d':'0123456789',
'\\D':controlchars+'\n\t !"#$%&\'()*+,-./:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~',
'\\w':'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_',
'\\W':controlchars+'\n\t !"#$%&\'()*+,-./:;<=>?@[\\]^`{|}~',
'[:alnum:]':'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789',
'[:alpha:]':'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ',
'[:ascii:]':controlchars+'\n\t !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~',
'[:blank:]':' \t',
'[:cntrl:]':controlchars,
'[:digit:]':'0123456789',
'[:graph:]':'!"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~',
'[:lower:]':'abcdefghijklmnopqrstuvwxyz',
'[:print:]':'\n\t !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~',
'[:punct:]':'`~!@#$%^&*()-_=+[{]}\\|;:\'",<.>/?',
'[:space:]':' \t\n',
'[:upper:]':'ABCDEFGHIJKLMNOPQRSTUVWXYZ',
'[:word:]':'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_',
'[:xdigit:]':'0123456789ABCDEF'
}
DELIMIT = {
'(':')',
')':'(',
'[':']',
']':'[',
'{':'}',
'}':'{'
}
def combos(lst,num):
if num == 0:
return [[]]
combs = []
for i in range(len(lst)):
for c in combos(lst[i+1:],num-1):
combs.append([lst[i]]+c)
return combs
def count_regex(regex):
exprs = []
level = 0
current = ''
for char in regex:
if char in '([':
level += 1
if char in ')]':
level -= 1
if char == '|' and level == 0:
exprs.append(current)
current = ''
else:
current += char
exprs.append(current)
comps = []
expanded = []
for e in exprs:
if (e[0] != '^' or e[-1] != '$'):
return 'Infinity'
num,member = count_expr(e[1:-1])
if num == 'Infinity':
return 'Infinity'
comps.append(num)
expanded.append(member)
total = sum(comps)
for i in range(2,len(expanded)+1):
for subset in combos(expanded,i):
if i % 2 == 0:
total -= count_doubles(subset)
else:
total += count_doubles(subset)
return total
def count_expr(expr):
exprs = []
level = 0
current = ''
for char in expr:
if char in '([':
level += 1
if char in ')]':
level -= 1
if char == '|' and level == 0:
exprs.append(current)
current = ''
else:
current += char
exprs.append(current)
if len(exprs) != 1:
comps = 0
members = []
sub = []
for e in exprs:
comp,memb = count_expr(e)
if comp == 'Infinity':
return 'Infinity',[]
comps += comp
members.append(('(',memb))
sub.append(memb)
for i in range(2,len(sub)+1):
for subset in combos(sub,i):
if i % 2 == 0:
comps -= count_doubles(subset)
else:
comps += count_doubles(subset)
return comps,[('|',members)]
sub = []
while expr != '':
char = expr[0]
if char in ['(','[','{']:
level = 1
i = 1
while level > 0:
nchar = expr[i]
if nchar == char: level += 1
if nchar == DELIMIT[char]: level -= 1
i += 1
sub.append((char,expr[1:i-1]))
expr = expr[i:]
elif char == '\\':
if expr[1] == 'n':
sub.append(('e','\\'+'\n'))
expr = expr[2:]
elif expr[1] == 't':
sub.append(('e','\\'+'\t'))
expr = expr[2:]
else:
sub.append(('e','\\'+expr[1]))
expr = expr[2:]
elif char in ['*','+','?']:
sub.append(('{',char))
expr = expr[1:]
else:
if char in '^$':
return 0
if char == '.':
sub.append(('[','[:ascii:]'))
expr = expr[1:]
else:
sub.append(('t',char))
expr = expr[1:]
components = []
members = []
for t,string in sub:
if t == '(':
comp,memb = count_expr(string)
components.append(comp)
members.append(('(',memb))
elif t == 'e':
if string in CLASSES:
components.append(len(CLASSES[string]))
else:
components.append(1)
elif t == '[':
components.append(count_class(string))
elif t == '{':
num = components[-1]
try:
components[-1] = sum([num**r for r in count_quantifier(string)])
except TypeError:
return 'Infinity',[]
elif t == 't':
components.append(1)
if t != '(':
members.append((t,string))
total = 1
for c in components:
if c == 'Infinity':
return 'Infinity',[]
total *= c
return total,members
def count_class(string):
if string in CLASSES:
return len(CLASSES[string])
if string[0] == '[' and string[-1] == ']':
return 1
negate = (string[0] == '^')
if negate: string = string[1:]
avail_count = 0
while string != '':
char = string[0]
if len(string) >= 3:
if string[1] == '-':
first,last = string[0],string[2]
avail_count += ord(last)-ord(first)+1
string = string[3:]
continue
avail_count += 1
string = string[1:]
if negate:
return 256-avail-count
return avail_count
def count_quantifier(string):
if string == '?':
return [0,1]
if string[0] in '*+':
return None
if ',' in string:
low,high = string.split(',')
if high == '':
return None
return range(int(low),int(high)+1)
return [int(string)]
def bracket_string(string):
negate = (string[0] == '^')
if negate: string = string[1:]
avail = ''
while string != '':
char = string[0]
if len(string) >= 3:
if string[1] == '-':
first,last = string[0],string[2]
for i in range(ord(first),ord(last)+1):
avail += chr(i)
string = string[3:]
continue
avail += char
string = string[1:]
if negate:
new = ''
for c in CLASSES['[:ascii:]']:
if c not in avail:
new += c
return new
return avail
def overlap(es):
chars=['' for i in range(len(es))]
for i,e in enumerate(es):
if e[0] == 'e':
if any(e[1] not in CLASSES for e in es):
chars[i] = e[1]
else:
chars[i] = CLASSES[e[1]]
for i,e in enumerate(es):
if e[0] == 't':
chars[i] = e[1]
for i,e in enumerate(es):
if e[0] == '[':
if e[1] in CLASSES:
chars[i] = CLASSES[e[1]]
else:
chars[i] = bracket_string(e[1])
total = 0
for c in CLASSES['[:ascii:]']:
has = True
for chs in chars:
if c not in chs:
has = False
break
if has:
total += 1
return total
def count_doubles(exprs):
if all(e==[] for e in exprs):
return 1
for i,expr in enumerate(exprs):
if len(expr) >= 2 and expr[1][0] == '{':
rng = count_quantifier(expr[1][1])
total = 0
for n in rng:
total += count_doubles([ [expr[0]]*n+expr[2:] ] + exprs[:i] + exprs[i+1:])
return total
for i,expr in enumerate(exprs):
if len(expr) >= 1 and expr[0][0] == '(':
return count_doubles([ expr[0][1]+expr[1:] ] + exprs[:i] + exprs[i+1:] )
if any(e==[] for e in exprs):
return 0
for i,expr in enumerate(exprs):
if expr[0][0] == '|':
total = 0
subs = []
for sub_expr in expr[0][1]:
subs.append([sub_expr])
total += count_doubles([ [sub_expr]+expr[1:] ] + exprs[:i] + exprs[i+1:])
for j in range(2,len(subs)+1):
for subset in combos(subs,j):
if j % 2 == 0:
total -= count_doubles(subset)
else:
total += count_doubles(subset)
return total
over = overlap([e[0] for e in exprs])
if over == 0:
return 0
return over * count_doubles([e[1:] for e in exprs])
reg = raw_input('Regex: ')
print count_regex(reg)
এখানে কিছু প্রাসঙ্গিক পরীক্ষার মামলা আমি নিশ্চিত করেছি:
Regex: ^[A-Za-z0-9]{8}$
218340105584896
Regex: ^([a-b]*)$
Infinity
Regex: ^([0-9]|[a-e])([a-e]|[A-E])$|^[a-f]{2}$
161
Regex: ^[a-z]{2}$|^[0-9]?[a-z]{2,3}$|^a[a-z]?$
200773
Regex: ^([a-z]|[a-e]|[A-E]|[3-4]|[D-G])$
35
Regex: ^\(.)\(.)\2\1$
16129*
Regex: ^(a)\1?$
2
Regex: ^[[:space:]]$|^\t$
3
* বৈধ আসকি হিসাবে সংজ্ঞায়িত হওয়া ক্ষেত্রে একটি চরিত্রের পার্থক্যের কারণে এটি গল্ফযুক্ত এবং অদৃশ্যদের মধ্যে আসলে আলাদা। আমি বিশ্বাস করি গল্ফ করা আরও সঠিক।
এর যথার্থতার জন্য আরও পরীক্ষা করা যেতে পারে তা নিশ্চিত করতে, দয়া করে আমাকে কোনও ত্রুটি সম্পর্কে অবহিত করুন (আমি সত্যই কিছুটা থাকলে আশ্চর্য হব না)।
^[A-Za-z0-9]{8}$? অন্যথায় উত্তর হবেinfinity।