The task is to generate the correct answer for a given math problem.

Ex Input:
Problem: the average of 10 numbers is 0 . in those 10 , at the least , how many may be greater than or equal to zero ?

Ex Output:
1


Ex Input:
Problem: if s and t are both odd prime numbers ands < t , then how many different positive integer factors does 2 sthave ?

Ex Output:
8


Ex Input:
Problem: a , b , k start from the same place and travel in the same direction at speeds of 30 km / hr , 40 km / hr , 60 km / hr respectively . b starts seven hours after a . if b and k overtake a at the same instant , how many hours after a did k start ?

Ex Output:

e ) 1