Problem:
How Many Divisors?

Write a program which reads three integers a, b and c, and prints the number of divisors of c between a and b.

Input

Three integers a, b and c are given in a line separated by a single space.

Output

Print the number of divisors in a line.

Constraints

1 ≤ a, b, c ≤ 10000

a ≤ b

Sample Input 1

5 14 80

Sample Output 1

3

Solution in Ruby (judge verdict: Accepted)

def read_input
  gets.split(" ").map(&:to_i)
end

def count_divisor(a, b, c)
  (a..b).count{|x| c % x == 0}
end

a, b, c = read_input
puts count_divisor(a, b,c).to_s