10239.betweenTheMountains.cpp

#include <iostream>
using namespace std;
int abs(int n)
{
	if (n < 0)
		return -1 * n;
	else
		return n;
}
int main()
{
	int i, j, t, a[1005], b[1005], la, lb, m;
	cin >> t;
	while (t--)
	{
		cin >> la;
		for (i = 0; i < la; i++)
			cin >> a[i];
		cin >> lb;
		for (i = 0; i < lb; i++)
			cin >> b[i];
		m = abs(a[0] - b[0]);
		for (i = 0; i < la; i++)
			for (j = 0; j < lb; j++)
			{
				if (abs(a[i] - b[j]) < m)
					m = abs(a[i] - b[j]);
			}
		cout << m << endl;
	}
	return 0;
}