import java.util.ArrayList;
import java.util.List;

class Region {
    public String id;
    public String name;
    public double measure;
    public boolean validated;
}

class Sample {
    public String id;
    public String name;
    public List<Region> regions;
}

class Subject {
    public String id;
    public String name;
    public List<Sample> samples;
}

class Statistics {
    public double min;
    public double max;
    public double average;
    public double standard_deviation;
}

class Main {
    public static Statistics compute_statistics(Subject subject) {
        // TODO: Generate an initialized Statistics object on the validated measures
        throw new UnsupportedOperationException();
    }

    public static Subject initializeSubject() {
        Region region1 = new Region() {{ id = "region1"; name = "Region 1"; measure = 0.7479292146246822;   validated = true;  }};
        Region region2 = new Region() {{ id = "region2"; name = "Region 2"; measure = 0.35938103837901936;  validated = true;  }};
        Region region3 = new Region() {{ id = "region3"; name = "Region 3"; measure = 0.47690169736867616;  validated = false; }};
        Region region4 = new Region() {{ id = "region4"; name = "Region 4"; measure = 0.8328541363182509;   validated = true;  }};
        Region region5 = new Region() {{ id = "region5"; name = "Region 5"; measure = 0.1702693951782932;   validated = true;  }};
        Region region6 = new Region() {{ id = "region6"; name = "Region 6"; measure = 0.6054679430861089;   validated = false; }};
        Region region7 = new Region() {{ id = "region7"; name = "Region 7"; measure = 0.10464613205570716;  validated = true;  }};
        Region region8 = new Region() {{ id = "region8"; name = "Region 8"; measure = 0.1252393281610148;   validated = true;  }};

        Sample sample1 = new Sample() {{ id = "sample1"; name = "Sample 1"; regions = new ArrayList<Region>() {{ add(region1); add(region2); add(region3); }}; }};
        Sample sample3 = new Sample() {{ id = "sample2"; name = "Sample 2"; regions = new ArrayList<Region>() {{ add(region4); add(region5); add(region6); }}; }};
        Sample sample2 = new Sample() {{ id = "sample3"; name = "Sample 3"; regions = new ArrayList<Region>() {{ add(region7); add(region8); }}; }};

        return new Subject() {{ id = "subject1"; name = "Subject 1"; samples = new ArrayList<Sample>() {{ add(sample1); add(sample2); add(sample3); }}; }};
    }

    public static void main(String[] args) {
        Subject subject = initializeSubject();
        Statistics statistics = compute_statistics(subject);
        System.out.println("min:     " + statistics.min);
        System.out.println("max:     " + statistics.max);
        System.out.println("average: " + statistics.average);
        System.out.println("std dev: " + statistics.standard_deviation);
    }
}