/*  CL = Charge Length
    SL = Stemming Length
    D = Borehole Diameter
    SDOB = Safe Blast Distance
    ED = Explosive Density
    SD = Safe Distance
    FOS = Factor of Safety

*/

import java.util.Scanner;

class AssignmentOne{

    public static void main(String[] args)
    {



        double CL, SL, D, ED, FOS, CCLF, SDOB, SD;

            ED = 1.2;

            FOS = 2.0;

                    Scanner scanner = new Scanner(System.in);

                System.out.print("Charge length (m): ");
                    CL = scanner.nextDouble();

                System.out.print("Stemming length (m): ");
                        SL = scanner.nextDouble();

                System.out.print("Borehole diameter (mm): ");
                        D = scanner.nextDouble();


        CCLF = 1000 * CL / D;

        if( CCLF >10) {

        CCLF = 10;}

            else { CCLF = (1000 * CL / D);
        }

        SDOB =  (SL + 0.0005 * CCLF * D) / (0.00923 * (CCLF * Math.pow(D, 3) * ED)); Math.pow(SDOB, 0.333);

        SD = (FOS * 11 * Math.pow(SDOB, -2.167)) * Math.pow(D, 0.667);


            System.out.println("The safe distance is: " + SD);

    }
}