#include <stdio.h>

int main(void)
{
    int n;
    scanf("%d", &n);
    int a[n];
    for (int i = 0; i < n; i++)
    {
        scanf("%d", &a[i]);
    }

    int b[n];
    for (int i = 0; i < n; i++)
    {
        scanf("%d", &b[i]);
    }

    int res = 0;
    for(int i = 0; i < n; i++)
    {
        if (a[i] > b[i])
            res += a[i];

        else if (b[i] > a[i])
            res += b[i];

        else if (b[i] == a[i])
            res += b[i];

    }
    printf("%d", res);

    return 0;
}