Problem:
Score : 200 points

Problem Statement

There are N gems. The value of the i-th gem is V_i.

You will choose some of these gems, possibly all or none, and get them.

However, you need to pay a cost of C_i to get the i-th gem.

Let X be the sum of the values of the gems obtained, and Y be the sum of the costs paid.

Find the maximum possible value of X-Y.

Constraints

All values in input are integers.

1 \leq N \leq 20

1 \leq C_i, V_i \leq 50

Input

Input is given from Standard Input in the following format:

N
V_1 V_2 ... V_N
C_1 C_2 ... C_N

Output

Print the maximum possible value of X-Y.

Sample Input 1

3
10 2 5
6 3 4

Sample Output 1

5

If we choose the first and third gems, X = 10 + 5 = 15 and Y = 6 + 4 = 10.
We have X-Y = 5 here, which is the maximum possible value.

Sample Input 2

4
13 21 6 19
11 30 6 15

Sample Output 2

6

Sample Input 3

1
1
50

Sample Output 3

0

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;

public class ABC0125_A2 {
    private static void Main(string[] args) {
        var inputs = new List<string>() {
            Console.ReadLine().Trim(),
            Console.ReadLine().Trim(),
            Console.ReadLine().Trim(),
        };

        Prepare(inputs);
    }

    private static void Prepare(List<string> inputs) {
        var numOfJewel = int.Parse(inputs[0]);
        var values = ConvertStrsToIntArray(inputs[1].Split());
        var costs = ConvertStrsToIntArray(inputs[2].Split());

        Compute(numOfJewel, values, costs);
    }

    private static void Compute(int numOfJewel, int[] values, int[] costs) {
        var profit = 0;

        for (var index = 0; index < numOfJewel; index++) {
            if (values[index] > costs[index])
                profit += values[index] - costs[index];
        }

        OutputAnswer(profit.ToString());
    }

    private static void OutputAnswer(string text) => Console.WriteLine(text);
    private static int[] ConvertStrsToIntArray(IEnumerable<string> texts) => texts.Select(x => int.Parse(x)).ToArray();
}