When recruiting at a company, the interviewer asked a question: if you had to take 100 sheep across the river in 3 equal times, how would you do it?

The first time he brought 34 children to the river, put 33 children on the boat, left 1 child on the boat, then went back to pick up 33 more children,
 left 1 fish left over, then returned to pick up the remaining 33 children.
 So each time the boat will carry the same number of children