Leetcode 1160. Find Words That Can Be Formed by Characters

文章作者：Tyan
博客：noahsnail.com  |  CSDN  |  简书

1. Description

2. Solution

**解析：**Version 1，使用Counter统计字符出现的次数，然后进行比较。Version 2，直接使用字符串的count方法统计字符出现的次数进行比较。

• Version 1

class Solution:def countCharacters(self, words: List[str], chars: str) -> int:candidates = Counter(chars)lengths = 0for word in words:good = Truetemp = Counter(word)for ch, num in temp.items():if ch not in candidates or temp[ch] - candidates[ch] > 0:good = Falsebreakif good:lengths += len(word)return lengths

• Version 2

class Solution:def countCharacters(self, words: List[str], chars: str) -> int:lengths = 0for word in words:good = Truefor ch in word:if word.count(ch) > chars.count(ch):good = Falsebreakif good:lengths += len(word)return lengths

Reference

1. https://leetcode.com/problems/find-words-that-can-be-formed-by-characters/