Day-3_Ransom_Note.py

'''
	Given an arbitrary ransom note string and another string containing letters from all the magazines, write a function that will return true if the ransom note can be constructed from the magazines ; otherwise, it will return false.

Each letter in the magazine string can only be used once in your ransom note.

Note:
You may assume that both strings contain only lowercase letters.

canConstruct("a", "b") -> false
canConstruct("aa", "ab") -> false
canConstruct("aa", "aab") -> true
'''


class Solution:
    def canConstruct(self, ransomNote: str, magazine: str) -> bool:
	    # subtract counts of corresponding words, keeping non-negative values
	    return not len(Counter(ransomNote) - Counter(magazine))