#include <stdio.h>
int main(void) {
int a,b,c,q,ans,j,tmp;
scanf("%d %d %d",&a
,&b
,&c
); j = (a - b) >> 31 & 1;
tmp = a;
a = j * a + (1 - j) * b;
b = j * b + (1 - j) * tmp;
for(a;a<b+1;a++)
{
q = (c % a == 0);
ans += q;
}
return 0;
}
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