Google Code Jam 2008 - Minimum Scalar Product - JavaScript

minimumScalarProduct.js

/* Copyright (c) 2015 by Gabriel Tomitsuka.
 * Node.js code for GCJ's https://code.google.com/codejam/contest/32016/dashboard#s=p0
 * Minimum Scalar Product
 */

var readline = require('readline');
var async = require('async');

var rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

rl.question('', function(testCases){
  var array = [];
  array[Number(testCases))] = " ";
  async.eachSeries(array, function(element, callback){
    rl.question('', function(howMany){ //Thanks JavaScript, result can be ignored :)
      rl.question('', function(v1String){
        var v1Array = v1String.split(' ');
        rl.question('', function(v2String){
          var v2Array = v2String.split(' ');
          console.log(minimumScalarProduct(v1Array, v2Array));
          callback();
        });
      });
    });
  })
});

var orderArray = function(a, b){ //Ascending
  return a - b;
}

var minimumScalarProduct = function(v1, v2){
  v1.sort(orderArray);
  v2.sort(orderArray);
  v2.reverse();

  var final = 0;
  for(var location = 0; location < v1.length; location++){
    var m1 = Number(v1[location]);
    var m2 = Number(v2[location]);
    final += m1 * m2;
  }
  return final;
}