bool operator==(Interval i1, Interval i2)
{
return i1.l() == i2.l() && i1.r() == i2.r();
}
bool operator>(Interval i1, Interval i2)
{
if(i1.l() > i2.l()) return true;
if(i1.l() < i2.l()) return false;
return i1.r() > i2.r();
}