import java.util.Scanner;


    public class Passionproject1 {
        public static void main(String[] args) {

            double Lab1;
            double Lab2;
            double Lab3;
            double Lab4;
            double Lab5;
            double Lab6;
            double Lab7;
            double Lab8;
            double Lab9;
            double Lab10;
            double Lab11;
            double Lab12;


            double LabAverage = 0.0;
            double LabScoreSum = 0.0;
            double LabCount = 0.0;

            Scanner sc = new Scanner(System.in);

            System.out.println("if Lab is not due and not submitted, it will be -1");

            System.out.println("Enter student's first lab grade.");
            Lab1 = sc.nextDouble();

            if (Lab1 != -1) {
                LabScoreSum = LabScoreSum + Lab1;
                LabCount = LabCount + 1;
            }

            System.out.println("Enter student's second lab grade");
            Lab2 = sc.nextDouble();

            if (Lab2 != -1) {
                LabScoreSum = LabScoreSum + Lab2;
                LabCount = LabCount + 1;
            }

            System.out.println("Enter student's third lab grade");
            Lab3 = sc.nextDouble();

            if (Lab3 != -1) {
                LabScoreSum = LabScoreSum + Lab3;
                LabCount = LabCount + 1;
            }

            System.out.println("Enter student's fourth lab grade");
            Lab4 = sc.nextDouble();

            if (Lab4 != -1) {
                LabScoreSum = LabScoreSum + Lab4;
                LabCount = LabCount + 1;
            }

            System.out.println("Enter student's fifth lab grade");
            Lab5 = sc.nextDouble();

            if (Lab5 != -1) {
                LabScoreSum = LabScoreSum + Lab5;
                LabCount = LabCount + 1;
            }

            System.out.println("Enter student's sixth lab grade");
            Lab6 = sc.nextDouble();

            if (Lab6 != -1) {
                LabScoreSum = LabScoreSum + Lab6;
                LabCount = LabCount + 1;
            }

            System.out.println("Enter student's seventh lab grade");
            Lab7 = sc.nextDouble();

            if (Lab7 != -1) {
                LabScoreSum = LabScoreSum + Lab7;
                LabCount = LabCount + 1;
            }

            System.out.println("Enter student's eighth lab grade");
            Lab8 = sc.nextDouble();

            if (Lab8 != -1) {
                LabScoreSum = LabScoreSum + Lab8;
                LabCount = LabCount + 1;
            }

            System.out.println("Enter student's ninth lab grade");
            Lab9 = sc.nextDouble();

            if (Lab9 != -1) {
                LabScoreSum = LabScoreSum + Lab9;
                LabCount = LabCount + 1;
            }

            System.out.println("Enter student's tenth lab grade");
            Lab10 = sc.nextDouble();

            if (Lab10 != -1) {
                LabScoreSum = LabScoreSum + Lab10;
                LabCount = LabCount + 1;
            }

            System.out.println("Enter student's eleventh lab grade");
            Lab11 = sc.nextDouble();

            if (Lab11 != -1) {
                LabScoreSum = LabScoreSum + Lab11;
                LabCount = LabCount + 1;
            }

            System.out.println("Enter student's twelfth lab grade");
            Lab12 = sc.nextDouble();

            if (Lab12 != -1) {
                LabScoreSum = LabScoreSum + Lab12;
                LabCount = LabCount + 1;
            }

            LabAverage = (LabScoreSum / LabCount);

            System.out.println("LabAverage:" + LabAverage);




        }
    }