static double UnionFindTest(IUnionFind uf, int n)
{
Stopwatch sw = new Stopwatch();
sw.Start();
Random rand = new Random();
// 进行n次操作， 每次随机选择两个元素进行合并
for (int i = 0; i < n; i++)
{
int a = rand.Next(n);
int b = rand.Next(n);
uf.UnitElement(a, b);
}
// 进行n次操作， 每次随机判断两个元素是否相连接
for (int i = 0; i < n; i++)
{
int a = rand.Next(n);
int b = rand.Next(n);
uf.IsConnected(a, b);
}
sw.Stop();
return(sw.Elapsed.TotalSeconds);
}