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 C (judge verdict: Time Limit Exceeded)

#include <stdio.h>

int zyouyo(int a);

int a,b,c,d=0,kotae;

int main(void){
  scanf("%d %d %d",&a,&b,&c);
  while(a<=b)
  kotae = zyouyo(a);
  if(kotae = 0){
    d=d+1;
    a++;
  } else{
    a++;
  }
  printf("%d\n",d);
  return 0;
}

int zyouyo(int a){
  kotae = c % a;
  return kotae;
}