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  1. Trie={}
  2. def insert(Trie,s,n):
  3. 	my_try=Trie
  4.  
  5. 	for i in range(n):
  6. 		if(s[i] in my_try):
  7. 			my_try=my_try[s[i]][0]
  8. 		else:
  9. 			my_try[s[i]]=[{},False]
  10. 			if(i==n-1):
  11. 				my_try[s[n-1]][1]=True
  12. 			my_try=my_try[s[i]][0]
  13. 	return(Trie)
  14.  
  15. def search(Trie,s,n):
  16. 	my_try=Trie
  17. 	for i in range(n):
  18. 		if(s[i] not in my_try):
  19. 			return(i)
  20. 		else:
  21. 			if(i==n-1):
  22. 				if(my_try[s[n-1]][1]==True or my_try[s[n-1]][1]==False ):
  23. 					return(-1)
  24. 		my_try=my_try[s[i]][0]
  25.  
  26. t=int(input())
  27. pos=[]
  28. neg=[]
  29. count=0
  30. for i in range(t):
  31. 	k=(input())
  32. 	if(k[0]=="-"):
  33. 		count=count+1
  34. 		neg.append(k[1:])
  35. 	else:
  36. 		pos.append(k[1:])
  37. if(count==0):
  38. 	print(0)
  39. elif(count==t):
  40. 	print(1)
  41. 	print('')
  42. else:
  43. 	output=[]
  44. 	ans=0
  45. 	for i in pos:
  46. 		Trie=insert(Trie,i,len(i))
  47. 	for i in neg:
  48. 		val=search(Trie,i,len(i))
  49. 		if(val==-1):
  50. 			print(-1)
  51. 			ans=-1
  52. 			break
  53. 		else:
  54. 			output.append(i[:val+1])
  55. 	if(ans>=0):
  56. 		we=list(set(output))
  57. 		we.sort()
  58. 		print(len(we))
  59. 		for q in we:
  60. 			print(q)
  61.  
  62.  
Success #stdin #stdout 0.02s 9176KB
comments (?)
stdin 
4
-code
+cc
-cccc
-ccctt
stdout 
2
ccc
co
https://ideone.com/9YvXG4
language:
Python 3 (python  3.9.5)
created:
5 years ago
visibility:
secret

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