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  1. Frequency Queries
  2. Discussions

Frequency Queries

  • ferlenbusch + 4 comments

    I kept adjusting my code, and got my solution to O(n), where n = number of queries, and it still didn't pass test case 10 due to time out. Cut out a bunch of fat from the Boilerplate, and finally got it everything to pass with my solution. Here's what I ended up with for my boilerplate: 


    public static void main(String[] args) throws IOException {
        try (BufferedReader bufferedReader = new BufferedReader(
                    new InputStreamReader(System.in))) {
            
            int q = Integer.parseInt(bufferedReader.readLine().trim());
            int[][] queries = new int[q][2];
           
            for (int i = 0; i < q; i++) {
                String[] query = bufferedReader.readLine().split(" ");
                queries[i][0] = Integer.parseInt(query[0]);
                queries[i][1] = Integer.parseInt(query[1]);
            }
          
            List<Integer> ans = freqQuery(queries);
          
            try (BufferedWriter bufferedWriter = new BufferedWriter(
                        new FileWriter(System.getenv("OUTPUT_PATH")))) {
            
                bufferedWriter.write(ans.stream().map(Object::toString)
                            .collect(joining("\n")) + "\n");
            }
        }
    }


    Solution method does need to take in int[][] instead of List<List<Integer>>

    • avinash_mv + 1 comment

      Thanks, Finally this worked for me. I used two maps one to track values and another to track frequencies. I don't know why hackerrack adds boiler plate code if it's so bad.

    • masterpradip + 0 comments

      Didn't work for me!

    • martindevillers + 0 comments

      Worked for me!

    • abrarahnaf + 0 comments

      bufferedWriter.write(ans.stream().map(Object::toString) .collect(joining("\n")) + "\n"); part of the boiler plate contains error please help cant figure out