diff --git a/day-18/day-18.py b/day-18/day-18.py
index 4b59717..e904e90 100644
--- a/day-18/day-18.py
+++ b/day-18/day-18.py
@@ -72,40 +72,37 @@ def explode(n, lvl=0):
     (left, right) = n
     if lvl == 4 and isinstance(left, int) and isinstance(right, int):
         return True, 0, left, right
-    else:
-        res, left, l, r = explode(left, lvl+1)
+    lvl += 1
+    res, left, l, r = explode(left, lvl)
+    if not res:
+        res, right, l, r = explode(right, lvl)
         if not res:
-            res, right, l, r = explode(right, lvl+1)
-            if not res:
-                return False, n, None, None
+            return False, n, None, None
+        if l:
+            if isinstance(left, int):
+                left = left + l
+                l = None
             else:
-                if l:
-                    if isinstance(left, int):
-                        left = left + l
-                        l = None
-                    else:
-                        res, left = explode_to_left(left, l)
-                        if res:
-                            l = None
-                return True, (left, right), l, r
+                res, left = explode_to_left(left, l)
+                if res:
+                    l = None
+        return True, (left, right), l, r
+    if r:
+        if isinstance(right, int):
+            right = right + r
+            r = None
         else:
-            if r:
-                if isinstance(right, int):
-                    right = right + r
-                    r = None
-                else:
-                    res, right = explode_to_right(right, r)
-                    if res:
-                        r = None
-            return True, (left, right), l, r
+            res, right = explode_to_right(right, r)
+            if res:
+                r = None
+    return True, (left, right), l, r
 
 
 def split(n):
     if isinstance(n, int):
         if 10 <= n:
             return True, (n // 2, (n + 1) // 2)
-        else:
-            return False, n
+        return False, n
     (left, right) = n
     res, left = split(left)
     if not res: