#include <bits/stdc++.h>

using namespace std;
int main() {
	int t; cin >> t;
		while (t--) {
			int n; cin >> n;
			vector<int>v1(n), v2(n);
			for (int i = 0; i < n; i++)
				cin >> v1[i];
			for (int i = 0; i < n; i++)
				cin >> v2[i];
			int ans = 0, d = 0;
			for (int i = 0; i < n; i++) {
				d = abs(v1[i] - v2[i]);
				ans = max(ans, d);
			}
			cout << ans << endl;
			v1.clear();
			v2.clear();
		}
}