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