#include<stdio.h>
int main()
{
    int ans;
    float n,x,y,p1;
    scanf("%f %f %f",&n,&x,&y);
    p1=(x/n)*100;
    if(p1<y)
    {
       y=y-p1;
       ans=(y*n)/100;
       if(ans<1)
       ans=1;
       
        
    }
    else
    ans=0;
    printf("%d",ceil(ans));
    return 0;
}