'Solution'

app/main.py

@@ -1,34 +1,65 @@
 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.decks = [
+            Deck(start[0], i)
+            if start[0] == end[0]
+            else Deck(a, 0)
+            for a in range(start[0], end[0] + 1)
+            for i in range(start[1], end[1] + 1)
+        ]
+        self.start = start
+        self.end = end
+        self.is_drowned = is_drowned
 
-    def get_deck(self, row, column):
-        # Find the corresponding deck in the list
-        pass
+    def get_deck(self, row: int, column: int) -> Deck:
+        for i in range(len(self.decks)):
+            if self.decks[i].row == row and self.decks[i].column == column:
+                return self.decks[i]
 
-    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:
+        for i in self.decks:
+            if i == self.get_deck(row, column):
+                i.is_alive = False
+                self.decks.remove(i)
+        if len(self.decks) == 0:
+            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: list[tuple]) -> None:
+        self.ships = ships
+        self.field = {}
+        for i in range(len(self.ships)):
+            ship = Ship(self.ships[i][0], self.ships[i][1])
+            for index in range(len(ship.decks)):
+                self.field[ship.decks[index]] = ship
+
+    def fire(self, location: tuple) -> str:
+        list_keys = [(keys.row, keys.column) for keys in self.field.keys()]
+        if location not in list_keys:
+            return "Miss!"
+
+        for keys, value in self.field.items():
+            column = keys.column
+            row = keys.row
+
+            if row == location[0] and column == location[1]:
+                column = keys.column
+                row = keys.row
+                value.fire(row, column)
+                if value.is_drowned is True:
+                    return "Sunk!"
+                else:
+                    return "Hit!"