Leetcode - Ransom Note Solution

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.

Example 1:

Input: ransomNote = "a", magazine = "b"
Output: false

Example 2:

Input: ransomNote = "aa", magazine = "ab"
Output: false

Example 3:

Input: ransomNote = "aa", magazine = "aab"
Output: true

Constraints:

• You may assume that both strings contain only lowercase letters.

Solution in Python#

from collections import Counter
class Solution:
    def canConstruct(self, ransomNote: str, magazine: str) -> bool:
        return not any((Counter(ransomNote)-Counter(magazine)).values())