public StatePair(int s1, int s2) {this.s1 = s1;this.s2 = s2;this.s = -1;}

public StatePair ( int s1 , int s2 ) { this . s1 = s1 ; this . s2 = s2 ; this . s = - 1 ; }
public StatePair(State s1, State s2){this.S1 = s1;this.S2 = s2;}
