#include 
     
      template
      
       class disj_set {public:    disj_set(){        for (int i=0; i
       
         rank[y])            father[fy] = fx;        else {            father[fx] = fy;            if (rank[fx] == rank[fy])                rank[fy]++;        }    }private:    int father[size];    int rank[size];};int main() {    disj_set<5> s1;    s1.find_set(0);    s1.find_set(1);    s1.find_set(2);    s1.find_set(3);    s1.find_set(4);    s1.union_set(1,3);    s1.find_set(2);    s1.find_set(4);    s1.union_set(0,1);    s1.union_set(1,2);    s1.union_set(2,3);    s1.union_set(3,4);}