0884. Uncommon Words From Two Sentences

# 884. Uncommon Words from Two Sentences#

## 题目 #

We are given two sentences `A` and `B`. (A sentence is a string of space separated words. 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.

Return a list of all uncommon words.

You may return the list in any order.

Example 1:

``````Input: A = "this apple is sweet", B = "this apple is sour"
Output: ["sweet","sour"]
``````

Example 2:

``````Input: A = "apple apple", B = "banana"
Output: ["banana"]
``````

Note:

1. `0 <= A.length <= 200`
2. `0 <= B.length <= 200`
3. `A` and `B` both contain only spaces and lowercase letters.

## 解题思路 #

• 找出 2 个句子中不同的单词，将它们俩都打印出来。简单题，先将 2 个句子的单词都拆开放入 map 中进行词频统计，不同的两个单词的词频肯定都为 1，输出它们即可。

## 代码 #

``````
package leetcode

import "strings"

func uncommonFromSentences(A string, B string) []string {
m, res := map[string]int{}, []string{}
for _, s := range []string{A, B} {
for _, word := range strings.Split(s, " ") {
m[word]++
}
}
for key := range m {
if m[key] == 1 {
res = append(res, key)
}
}
return res
}

``````

Apr 8, 2023