diff --git a/app/main.py b/app/main.py
index 626f41cf..d726502f 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1,34 +1,95 @@
+from typing import Tuple, List, Union
+
+
 class Deck:
-    def __init__(self, row, column, is_alive=True):
-        pass
+    def __init__(self, row: int, column: int, is_alive: bool = True) -> None:
+        self.is_alive = is_alive
+        self.coordinate = (row, column)
 
 
 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[int, int],
+                 end: Tuple[int, int],
+                 is_drowned: bool = False) -> None:
+        self.is_drowned = is_drowned
+        self.decks = Ship.create_decks(start, end)
+
+    def get_deck(self, row: int, column: int) -> Union[Deck, None]:
+        for deck in self.decks:
+            if deck.coordinate == (row, column):
+                return deck
+
+    def fire(self, row: int, column: int) -> str:
+        self.get_deck(row, column).is_alive = False
+        self.is_it_drowned()
+
+        if self.is_drowned:
+            return "Sunk!"
+        return "Hit!"
+
+    def is_it_drowned(self) -> None:
+        self.is_drowned = not any([deck.is_alive for deck in self.decks])
+
+    def get_length(self) -> int:
+        return len(self.decks)
 
-    def get_deck(self, row, column):
-        # Find the corresponding deck in the list
-        pass
+    @staticmethod
+    def create_decks(ship_begin: Tuple[int, int],
+                     ship_end: Tuple[int, int]) -> List:
 
-    def fire(self, row, column):
-        # Change the `is_alive` status of the deck
-        # And update the `is_drowned` value if it's needed
-        pass
+        ship_decks = []
+
+        for row in range(ship_begin[0], ship_end[0] + 1):
+            for column in range(ship_begin[1], ship_end[1] + 1):
+                ship_decks.append(Deck(row, column))
+
+        return ship_decks
 
 
 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._init_field(ships)
+        self.print_field()
+
+    def _init_field(self, ships: List[Tuple]) -> None:
+        self.field = {}
+        for ship in ships:
+            temp_ship = Ship(*ship)
+            for deck in temp_ship.decks:
+                self.field[deck.coordinate] = temp_ship
+
+    def fire(self, location: Tuple[int, int]) -> str:
+        ship = self.field.get(location)
+        if ship is not None:
+            return ship.fire(*location)
+        return "Miss!"
+
+    def print_field(self) -> None:
+        row = -1
+        column = -1
+        empty = " ~ "
+        alive_deck = " □ "
+        hit_deck = " * "
+        drowned_ship = " x "
+
+        def print_cell(coord: tuple) -> str:
+            ship = coord
+            if ship in self.field:
+                if self.field[ship].is_drowned:
+                    return drowned_ship
+                elif not self.field[ship].get_deck(ship[0], ship[1]).is_alive:
+                    return hit_deck
+                elif self.field[ship].get_deck(ship[0], ship[1]).is_alive:
+                    return alive_deck
+            else:
+                return empty
+
+        for cell in range(100):
+            if column == 9:
+                column = -1
+            if cell % 10 == 0:
+                row += 1
+                print()
+            column += 1
+            print(f" {print_cell((row, column))} ", end=" ")