/in/foo.cc:16:30: error: ISO C++ forbids declaration of 'findP' with no type [-fpermissive]
 findP(int root,int ori,int ed){
                              ^
/in/foo.cc: In function 'int findP(int, int, int)':
/in/foo.cc:50:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^