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