#include<stdio.h>
int main()
{
int m,s,t,d,e;
scanf("%d %d %d",&m,&s,&t);
if(s==0)
printf("0");
else
d=t/s;
if(d>=100)
printf("0");
else 
{if(t%s==0)
{e=m-d;
printf("%d",e);}
else 
{e=m-d-1;
printf("%d",e);}}


return 0;}