Solution

app/main.py

@@ -1,34 +1,80 @@
+from typing import List, Tuple
+
+
 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.is_drowned = is_drowned
+        self.decks = self.create_decks()
+
+    def create_decks(self) -> List[Deck]:
+        decks = []
+        start_row, start_column = self.start
+        end_row, end_column = self.end
+        if start_row == end_row:
+            for column in range(start_column, end_column + 1):
+                decks.append(Deck(start_row, column))
+        elif start_column == end_column:
+            for row in range(start_row, end_row + 1):
+                decks.append(Deck(row, start_column))
+        return decks
 
-    def get_deck(self, row, column):
-        # Find the corresponding deck in the list
-        pass
+    def get_deck(self, row: int, column: int) -> Deck:
+        for deck in self.decks:
+            if deck.row == row and deck.column == column:
+                return deck
 
-    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 fire(self, row: int, column: int) -> None:
+        deck = self.get_deck(row, column)
+        deck.is_alive = False
+
+        if all(not deck.is_alive for deck in self.decks):
+            self.is_drowned = True
 
 
 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: Tuple[tuple]) -> None:
+        self.field = {}
+        for ship in ships:
+            new_ship = Ship(*ship)
+            for deck in new_ship.decks:
+                self.field[(deck.row, deck.column)] = new_ship
+
+    def fire(self, location: tuple) -> str:
+        if location not in self.field:
+            return "Miss!"
+        ship = self.field[location]
+        ship.fire(*location)
+        if ship.is_drowned:
+            return "Sunk!"
+        return "Hit!"
+
+    def print_field(self) -> None:
+        field = [["~"] * 10] * 10
+        for location, ship in self.field.items():
+            row, column = location
+            if ship.is_drowned:
+                field[row][column] = "x"
+            elif not ship.get_deck(row, column).is_alive:
+                field[row][column] = "*"
+            else:
+                field[row][column] = u"\u25A1"
+        print(field)