我自己写的并查集的标程（例程），方便适用，短小精悍，可作为模板直接在oj上直接刷题使用。同时亦可作为数学结构学习者学习使用。-I wrote it myself and set the standard search process (routine) to facilitate the application of dapper, can be used as a template directly in the title oj brush to use directly. At the same time as learning to use the mathematical structure of the learner.