From 1ef0d9d4dc117a182dcf8838a11545b3aa7f5632 Mon Sep 17 00:00:00 2001
From: Bogdan Bodenkov <bodinkovb@gmail.com>
Date: Sat, 31 Jan 2026 20:14:31 +0200
Subject: [PATCH] Solution

---
 app/main.py | 52 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 51 insertions(+), 1 deletion(-)

diff --git a/app/main.py b/app/main.py
index fa56336e..455080b0 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1 +1,51 @@
-# write your code here
+import dataclasses
+from datetime import datetime
+import pickle
+
+
+@dataclasses.dataclass
+class Specialty:
+    name: str
+    number: int
+
+
+@dataclasses.dataclass
+class Student:
+    first_name: str
+    last_name: str
+    birth_date: datetime
+    average_mark: float
+    has_scholarship: bool
+    phone_number: str
+    address: str
+
+
+@dataclasses.dataclass
+class Group:
+    specialty: Specialty
+    course: int
+    students: list[Student]
+
+
+def write_groups_information(groups: list[Group]) -> int:
+    with open("groups.pickle", "wb") as f:
+        pickle.dump(groups, f)
+    return max((len(g.students) for g in groups), default=0)
+
+
+def write_students_information(students: list[Student]) -> int:
+    with open("students.pickle", "wb") as f:
+        pickle.dump(students, f)
+    return len(students)
+
+
+def read_groups_information() -> list[str]:
+    with open("groups.pickle", "rb") as f:
+        groups: list[Group] = pickle.load(f)
+
+    return list({group.specialty.name for group in groups})
+
+
+def read_students_information() -> list[Student]:
+    with open("students.pickle", "rb") as f:
+        return pickle.load(f)