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