#include <iostream>
using namespace std;
const int N = 1e5 + 10;
int p[N],t[N],s[N],a[N];
int main()
{
int n;
cin >> n;
for(int i = 1; i <= n; i ++)
{
cin >> p[i];
}
for(int i = 1; i <= n; i ++)
{
cin >> t[i];
}
for(int i = 1; i <= n; i ++)
{
a[i] = t[i] - p[i];
s[i] = a[i] - a[i-1];
}
int a = 0;
int b = 0;
for(int i = 1; i <= n; i ++)
{
s[i] > 0? a += s[i]:b+=s[i];
}
cout << max(a,abs(b)) << endl;
return 0;
}