#include <stdio.h>
int main(void)
{
int a, b, c;
int n = 0;
int i;
int z;
scanf("%d %d %d", &a
, &b
, &c
);
if (a > b)
{
z = a;
a = b;
b = z;
}
i = a;
while (i <= b)
{
if (c % i == 0)
{
n++;
}
i++;
}
return 0;
}
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