import java.io.BufferedReader;
import java.io.InputStreamReader;

public class AA {

    public static void main( final String[] args ) throws Exception {
        final BufferedReader br = new BufferedReader( new InputStreamReader( System.in ) );
        final String[] parts = br.readLine().split( " " );
        final int n = Integer.parseInt( parts[0] );
        final int x = Integer.parseInt( parts[1] );
        final int y = Integer.parseInt( parts[2] );
        System.out.println( solve( n, x, y ) );
    }

    public static int solve( final int n, final int x, final int y ) {
        int r = 0;
        while ( 100D * ( r + x ) / n < y ) {
            ++r;
        }
        return r;
    }

}
