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.
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"]
Solution
class Solution:
def uncommonFromSentences(self, s1: str, s2: str) -> List[str]:
ss = s1.split() + s2.split()
d = {}
for w in ss:
if w in d:
d[w] += 1
else:
d[w] = 1
return [w for w in d if d[w] == 1]