import java.util.Scanner;

public class Main {
  public static void main(final String[] args) {

    Scanner sc = new Scanner(System.in);
    int iNum = sc.nextInt();
    sc.nextLine();
    String sValue = sc.nextLine();
    String sCost = sc.nextLine();
    String[] sSplitVal = sValue.split(" ");
    String[] sSplitCost = sCost.split(" ");
    int iResult = 0;
    for (int ii = 0; ii < iNum; ii++) {
      int iVal = Integer.parseInt(sSplitVal[ii]);
      int iCost = Integer.parseInt(sSplitCost[ii]);
      int iCalc = iVal - iCost;
      if (0 < iCalc) {
        iResult += iCalc;
      }
    }
    System.out.print(iResult);
  }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz