diff --git a/app/main.py b/app/main.py
index 626f41cf..b70fab2f 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1,34 +1,80 @@
+from typing import List
+
+
 class Deck:
-    def __init__(self, row, column, is_alive=True):
-        pass
+    def __init__(
+            self,
+            row: int,
+            column: int,
+            is_alive: bool = True
+    ) -> None:
+        self.row = row
+        self.column = column
+        self.is_alive = is_alive
 
 
 class Ship:
-    def __init__(self, start, end, is_drowned=False):
-        # Create decks and save them to a list `self.decks`
-        pass
+    def __init__(
+            self,
+            start: tuple,
+            end: tuple,
+            is_drowned: bool = False
+    ) -> None:
+        self.start = start
+        self.end = end
+        self.ship = []
+        self.is_drowned = is_drowned
+        self.deck()
+
+    def get_deck(self, row: int, column: int) -> Deck:
+        for deck in self.ship:
+            if deck.row == row and deck.column == column:
+                return deck
 
-    def get_deck(self, row, column):
-        # Find the corresponding deck in the list
-        pass
+    def fire(self, row: int, column: int) -> None:
+        current_deck = self.get_deck(row, column)
+        current_deck.is_alive = False
+        self.is_drowned = all(not deck.is_alive for deck in self.ship)
 
-    def fire(self, row, column):
-        # Change the `is_alive` status of the deck
-        # And update the `is_drowned` value if it's needed
-        pass
+    def deck(self) -> None:
+        for row in range(self.start[0], self.end[0] + 1):
+            for column in range(self.start[1], self.end[1] + 1):
+                deck = Deck(row, column)
+                self.ship.append(deck)
 
 
 class Battleship:
-    def __init__(self, ships):
-        # Create a dict `self.field`.
-        # Its keys are tuples - the coordinates of the non-empty cells,
-        # A value for each cell is a reference to the ship
-        # which is located in it
-        pass
-
-    def fire(self, location: tuple):
-        # This function should check whether the location
-        # is a key in the `self.field`
-        # If it is, then it should check if this cell is the last alive
-        # in the ship or not.
-        pass
+    def __init__(self, ships: List[tuple]) -> None:
+        self.ships = ships
+        self.field = {}
+        for ship in ships:
+            new_ship = Ship(ship[0], ship[1])
+            for deck in new_ship.ship:
+                self.field[(deck.row, deck.column)] = new_ship
+        self.field_ship = {num: ["~"] * 10 for num in range(10)}
+        self.location_ship = []
+        self._ships_place()
+
+    def fire(self, location: tuple) -> str:
+        if location not in self.field:
+            return "Miss!"
+        ship = self.field[location]
+        ship.fire(location[0], location[1])
+        if ship.is_drowned:
+            for deck in ship.ship:
+                self.field_ship[deck.row][deck.column] = "X"
+            return "Sunk!"
+        self.field_ship[location[0]][location[1]] = "*"
+        return "Hit!"
+
+    def _ships_place(self) -> None:
+        print(self.field)
+        for start, end in self.ships:
+            ship_pos = Ship(start, end)
+            for ship in ship_pos.ship:
+                self.location_ship.append(ship)
+                self.field_ship[ship.row][ship.column] = "□"
+
+    def print_field(self) -> None:
+        for row in self.field_ship:
+            print("    ".join(self.field_ship[row]))