Poj Solution 2860

http://poj.org/problem?id=2860

//* @author ������<hongxp11@163.com>
import java.util.Scanner;


public class Main {
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int m = in.nextInt();
        int k = in.nextInt();
        int[] initial= new int[k];
        int[] finish = new int[k];
        for(int i = 0; i< k; i++)
        {
            initial[i] = in.nextInt();
        }
        for(int i = 0; i< k; i++)
        {
            finish[i] = in.nextInt();
        }
        int sum = 0;
        for(int i = 0; i< k; i++)
        {
            int l = finish[i] - initial[i];
            if(l>0)
                sum += l;
        }
        System.out.println(sum);
    }
}