#include<stdio.h>
#include<math.h>
int main()
{
    int n,x,y,a;
    double c;
    while( scanf( "%d%d%d",&n,&x,&y ) != EOF )
    {
        c =  n * y * 0.01 - x;
        a = ( int )c;
        if( c - a * 1.0 > 0.0 )
            a += 1;
        printf( "%d\n",a );
    }
    return 0;
}