View Compilation Error

0_0_13833095_7984.cpp: In function 'int main()':
0_0_13833095_7984.cpp:98:22: error: no match for 'operator!=' (operand types are 'Pnt' and 'Pnt')
    if(find(es[i].p1) != find(es[i].p2))
                      ^
0_0_13833095_7984.cpp:98:22: note: candidate is:
0_0_13833095_7984.cpp:14:7: note: bool Pnt::operator!=(Pnt&)
  bool operator!=(Pnt& p) {return (x!=p.x || y!=p.y);}
       ^
0_0_13833095_7984.cpp:14:7: note:   no known conversion for argument 1 from 'Pnt' to 'Pnt&'