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find-the-difference.py 950 Bytes
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Allen Liu 提交于 7年前 . update
# Time: O(n)
# Space: O(1)
import operator
import collections
from functools import reduce
class Solution(object):
def findTheDifference(self, s, t):
"""
:type s: str
:type t: str
:rtype: str
"""
return chr(reduce(operator.xor, map(ord, s), 0) ^ reduce(operator.xor, map(ord, t), 0))
def findTheDifference2(self, s, t):
"""
:type s: str
:type t: str
:rtype: str
"""
t = list(t)
s = list(s)
for i in s:
t.remove(i)
return t[0]
def findTheDifference3(self, s, t):
return chr(reduce(operator.xor, map(ord, s + t)))
def findTheDifference4(self, s, t):
return list((collections.Counter(t) - collections.Counter(s)))[0]
def findTheDifference5(self, s, t):
s, t = sorted(s), sorted(t)
return t[-1] if s == t[:-1] else [x[1] for x in zip(s, t) if x[0] != x[1]][0]
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