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import sys import re class node(dict): name="" parent=None
top=node() def name2leaf(ending): rv="" p=ending while p is not None: rv=p.name+" "+rv p=p.parent return rv try: while True: line=sys.stdin.next()
startpos=0 ptr=top dupsfound=[] lastAdded=None while True: m=re.match("\s*<(\w+)>",line[startpos:]) if not m: break word=m.group(1)
if not ptr.keys() and ptr!=lastAdded and ptr!=top: dupsfound.append(name2leaf(ptr)) try: next=ptr[word] except KeyError: next=node() next.parent=ptr next.name=word lastAdded=next ptr[word]=next ptr=next startpos+=m.end() if startpos!=0: if ptr.keys():
for other in ptr.keys(): dupsfound.append(name2leaf(ptr[other])+"(+?)")
mystring=name2leaf(ptr)
for i in dupsfound: print "Prefix conflict found: (%s) vs (%s)"%(mystring, i) except StopIteration: print "hit end" pass print "Done."
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