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How to solve ransom note problem in HackerRank?
I just solved the Hash Tables: Ransom Note problem on Hackerrank using both Java-8 and Java-7. Given m words in a magazine and the n words in the ransom note, print Yes if a kidnapper can replicate his ransom note exactly (case-sensitive) using whole words from the magazine; otherwise, print No. 1 ≤ m, n ≤ 30000.
How to hash magazine words instead of ransom?
You can use magazine.includes (hashTable [keys]) instead of magazine.hasOwnProperty (keys) Lastly, you should hash magazine’s words and not ransom’s words, and keep a count for the number of occurrences of each of the magazine words.
How to print Yes on a ransom note?
Given m words in a magazine and the n words in the ransom note, print Yes if a kidnapper can replicate his ransom note exactly (case-sensitive) using whole words from the magazine; otherwise, print No. 1 ≤ m, n ≤ 30000. I am looking for suggestions regarding the efficiency, coding style and if this is the best way to solve this kind of problem.
How to gain efficiency with the ransom notes?
A major change to gain efficiency is to never build the frequency map for the ransom notes. Instead use the following strategy to solve the problem: Put all the magazine words into a map like you did now. Try to take each ransom word out of that bag while reading them from the file.
How to make an untraceable ransom note?
Hackerrank – Hash Tables: Ransom Note Solution Harold is a kidnapper who wrote a ransom note, but now he is worried it will be traced back to him through his handwriting. He found a magazine and wants to know if he can cut out whole words from it and use them to create an untraceable replica of his ransom note.
Do you print Yes or no on a ransom note?
Given the words in the magazine and the words in the ransom note, print Yes if he can replicate his ransom note exactly using whole words from the magazine; otherwise, print No. The magazine has all the right words, but there is a case mismatch.
How to add a ransom note to a hash table?
Start a for loop with length as the size of magazine words and then add each word to the Map. The if statement makes sure that if same word occurs more than once , the count is increased to that value in Map, instead of overwriting. Repeat the same process for ransom note.
What are the parameters of a ransom note?
Complete the checkMagazine function in the editor below. It must print if the note can be formed using the magazine, or . checkMagazine has the following parameters: The first line contains two space-separated integers, and , the numbers of words in the and the , respectively.