struct position	all_different(struct position pos, float eps,int level ) ;struct particle constrain(struct particle part,int level);double         constrain_positive(double A);double         constrain_null(double A);struct position dichotom(struct position p0, struct position p1, int level);struct position domain_pos(struct position pos,struct search_space H);double   Myconstrain(struct position pos, int level);