#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 = b - (a-b & j);
b = tmp - (a-b & j);
for(a;a<b+1;a++)
{
q = (c % a == 0);
ans += q;
}
return 0;
}
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