Method extractTrueMarks

src/main/java/Main.java:2340–2348

(Map<String, Boolean> marks)

    }

    private static List<String> extractTrueMarks(Map<String, Boolean> marks) {
        List<String> trueMarks = new ArrayList<>();
        for (Map.Entry<String, Boolean> entry : marks.entrySet()) {
            if (entry.getValue()) {
                trueMarks.add(entry.getKey());
            }
        }
        return trueMarks;
    }
}