Ransom Note LeetCode Solution

Problem – Ransom Note LeetCode Solution

Given two strings ransomNote and magazine, return true if ransomNote can be constructed by using the letters from magazine and false otherwise.

Each letter in magazine can only be used once in ransomNote.

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:

  • 1 <= ransomNote.length, magazine.length <= 105
  • ransomNote and magazine consist of lowercase English letters.

Ransom Note LeetCode Solution in Java

public class Solution {
    public boolean canConstruct(String ransomNote, String magazine) {
        int[] arr = new int[26];
        for (int i = 0; i < magazine.length(); i++) {
            arr[magazine.charAt(i) - 'a']++;
        }
        for (int i = 0; i < ransomNote.length(); i++) {
            if(--arr[ransomNote.charAt(i)-'a'] < 0) {
                return false;
            }
        }
        return true;
    }
}

Ransom Note LeetCode Solution in Python

def canConstruct(self, ransomNote, magazine):
    return not collections.Counter(ransomNote) - collections.Counter(magazine)

Ransom Note LeetCode Solution in C++

bool canConstruct(string ransomNote, string magazine) {
        
        int count[26] = {0};
        for(char ch : magazine)
            count[ch - 'a']++;
        
        for(char ch : ransomNote)
            if(count[ch - 'a']-- <= 0)
                return false;
        
        return true;
    }
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This Problem is intended for audiences of all experiences who are interested in learning about Data Science in a business context; there are no prerequisites.

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