import java.util.Random;

/**
 * Created by ECGQoEFX on 3/10/2018.
 */
public class Driver {

   public static void main(String args[]) {
       Random random = new Random();
       int trials = 1000000;
       double totalYoungestBoys = 0;
       double totalYoungestGirls = 0;

       for(int i = 0; i < trials; i++) {
           boolean isEldestGirl = true;
           boolean isYoungestGirl = random.nextBoolean();

           //random child opens door
           if(random.nextBoolean()) {
               //eldest opens door
               if(isYoungestGirl) {
                   totalYoungestGirls += 1;
               } else {
                   totalYoungestBoys += 1;
               }

           } else {
               //youngest case
               if(!isYoungestGirl) {
                   //boy opened door, throw out.
               } else {
                   totalYoungestGirls += 1;
               }

           }
       }

       System.out.println("Youngest is girl: " + totalYoungestGirls);
       System.out.println("Youngest is boy: " + totalYoungestBoys);

       System.out.println("Odds of youngest being a boy = " + totalYoungestBoys / (totalYoungestBoys + totalYoungestGirls));
   }
}