并查集处理错误

[DormancyWang]

在kruscal 算法当中 博客写的是 “终点”这个不好理解的概念 其实完全是博主坑爹自己创造的判断条件，此处应该使用并查集来确定是否成环。

在代码中 博主写的是 vends[m]=n; 这个语句也不符合博主 ”终点“ 的定义，应该先判断m，n大小
if(m<n) swap(m,n)
vends[m]=n;
否则会造成一个边重复出现的错误 下面是出现错误的测试用例： （出现了（0,1） （1,0））
int[] graph0 = new int[]{0, 10, MAX_WEIGHT, MAX_WEIGHT, MAX_WEIGHT, 11, MAX_WEIGHT, MAX_WEIGHT, MAX_WEIGHT};
int[] graph1 = new int[]{10, 0, 18, MAX_WEIGHT, MAX_WEIGHT, MAX_WEIGHT, 16, MAX_WEIGHT, 12};
int[] graph2 = new int[]{MAX_WEIGHT, 18, 0, 22, MAX_WEIGHT, MAX_WEIGHT, MAX_WEIGHT, MAX_WEIGHT, 8};
int[] graph3 = new int[]{MAX_WEIGHT, MAX_WEIGHT, 22, 0, 20, MAX_WEIGHT, MAX_WEIGHT, 16, 21};
int[] graph4 = new int[]{MAX_WEIGHT, MAX_WEIGHT, MAX_WEIGHT, 20, 0, 26, MAX_WEIGHT, 7, MAX_WEIGHT};
int[] graph5 = new int[]{11, MAX_WEIGHT, MAX_WEIGHT, MAX_WEIGHT, 26, 0, 17, MAX_WEIGHT, MAX_WEIGHT};
int[] graph6 = new int[]{MAX_WEIGHT, 16, MAX_WEIGHT, MAX_WEIGHT, MAX_WEIGHT, 17, 0, 19, MAX_WEIGHT};
int[] graph7 = new int[]{MAX_WEIGHT, MAX_WEIGHT, MAX_WEIGHT, 16, 7, MAX_WEIGHT, 19, 0, MAX_WEIGHT};
int[] graph8 = new int[]{MAX_WEIGHT, 12, 8, 21, MAX_WEIGHT, MAX_WEIGHT, MAX_WEIGHT, MAX_WEIGHT, 0};

    graph.matrix[0] = graph0;
    graph.matrix[1] = graph1;
    graph.matrix[2] = graph2;
    graph.matrix[3] = graph3;
    graph.matrix[4] = graph4;
    graph.matrix[5] = graph5;
    graph.matrix[6] = graph6;
    graph.matrix[7] = graph7;
    graph.matrix[8] = graph8;