diff --git a/HNS/Excercises/ShipCraft/main.py b/HNS/Excercises/ShipCraft/main.py
index 44cd4b1..b05d62f 100644
--- a/HNS/Excercises/ShipCraft/main.py
+++ b/HNS/Excercises/ShipCraft/main.py
@@ -80,6 +80,7 @@ def draw_field(window, field):
             btn.bind('<Button-3>', right_button_click)
             btn.bind('<Enter>', lambda e, x=r, y=c: button_enter(field, x, y))
             buttons.append(btn)
+    colorize(field, buttons)
 
 
 def colorize(field, buttons):
@@ -98,19 +99,15 @@ def colorize(field, buttons):
 
 def keypress_handler(e):
     global ship_size
-    if 1 <= int(e.keysym) <= 4:
-        ship_size = int(e.keysym)
-        return ship_size
-
-
-def keypress_handler_2(f):
     global field_mode
-    if f.keysym == 'm':
-        if field_mode == 0:
-            field_mode = 1
-        else:
-            field_mode = 0
-        return field_mode
+    if e.keysym.isnumeric():
+        ship_size = int(e.keysym)
+    else:
+        if e.keysym == 'm':
+            if field_mode == 0:
+                field_mode = 1
+            else:
+                field_mode = 0
 
 
 def left_button_click(field, row, col):
@@ -177,7 +174,7 @@ def check_blocked(field, row, col):
     # либо находятся за пределами поля, либо в них нет корабля/они пустые
     for r in range(row - 1, row + 2):
         for c in range(col - 1, col + 2):
-            if 0 < r < field_size and 0 < c < field_size:
+            if 0 <= r < field_size and 0 <= c < field_size:
                 cell = (field[r * field_size + c]).strip()
                 if cell != '' and cell != 'p':
                     return False
@@ -188,7 +185,6 @@ window = Tk()
 window.title("Ship Craft!")
 window.geometry('450x410')
 window.bind_all('<KeyPress>', keypress_handler)
-window.bind_all('<KeyPress>', keypress_handler_2)
 set_ship(1, 1, 4, 1)
 set_ship(0, 6, 3, 0)
 set_ship(7, 3, 1, 0)