We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
  1. Practice
  2. Data Structures
  3. Arrays
  4. Sparse Arrays
  5. Discussions

Sparse Arrays

  • solomkinmv + 0 comments

    Your solution is very inefficient.

    Here I suggest you functional approach, better efficiency and readability.

    Scanner sc = new Scanner(System.in);

Map<String, Long> counterMap = Stream.generate(sc::next)
    .limit(sc.nextInt())
    .collect(groupingBy(identity(), counting()));

Stream.generate(sc::next)
    .limit(sc.nextInt())
    .map(query -> counterMap.getOrDefault(query, 0L))
    .forEach(System.out::println);

    P.S. imports are omitted.