>>12513205you never indicated the direction of the ants. If they are not in the same line they won't touch, moving the same speed also doesn't mean very much, it doesn't imply they move straight.
One ant follows one other also doesn't indicate which follows which.
also we dont know the will of the ants.
take this scenario:
.....
===========
_________.....
where the first ant is following the last ant and the second to the second to last etc.
.......................
===========
.......................
the ants are now centered. now they must pick to move left or right to follow the ant.
if one group move the same way they will never meet. if they move opposite they will meet.
and then the ants that meet will turn around and met again.
and that's just one scenario.
so it's between 0 and infinity.
