/**
* this method computes the intersection between this set and ot set.
*
* @param ot - the other set
*/
public VertexSet intersection(VertexSet ot) {
VertexSet ans = new VertexSet();
int i1 = 0, i2 = 0;
while (i1 < this.size() & i2 < ot.size()) {
int a1 = this.at(i1), a2 = ot.at(i2);
if (a1 == a2) {
ans.add(a1);
i1++;
i2++;
} else if (a1 < a2) {
i1++;
} else i2++;
}
return ans;
}
public VertexSet(VertexSet ot) {
_set = new int[INIT_SIZE];
_sp = 0;
for (int i = 0; i < ot.size(); i++) this.add(ot.at(i));
}
