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Uncommon Words from Two Sentences

Problem Statement​

A sentence is a string of single-space separated words where each word consists only of lowercase letters.

A word is uncommon if it appears exactly once in one of the sentences, and does not appear in the other sentence.

Given two sentences s1 and s2, return a list of all the uncommon words. You may return the answer in any order.

Leetcode Link

Example 1:​

Input: s1 = "this apple is sweet", s2 = "this apple is sour"
Output: ["sweet","sour"]

Example 2:​

Input: s1 = "apple apple", s2 = "banana"
Output: ["banana"]

Constraints:​

  • 1 <= s1.length, s2.length <= 200
  • s1 and s2 consist of lowercase English letters and spaces.
  • s1 and s2 do not have leading or trailing spaces.
  • All the words in s1 and s2 are separated by a single space.

Code​

Python Code

from collections import Counter
class Solution(object):
    def uncommonFromSentences(self, s1, s2):
        s1 = s1.split()
        s2 = s2.split()
        s = s1+s2
        count = Counter(s)
        arr = [k for k,v in count.iteritems() if v==1]
        return arr