【leetcode 简单】 第八十九题 赎金信

from collections import Counter
class Solution( ):
    def canConstruct(self, ransomNote, magazine):
        """
        :type ransomNote: str
        :type magazine: str
        :rtype: bool
        """
        a,b = map(Counter,(ransomNote,magazine))
        for i in a:
            if i not in b:
                return False
            if i in b and a[i] > b[i]:
                return False
        return True