Create 0838-push-dominoes.py

Author: GraydenH

python/0838-push-dominoes.py

@@ -0,0 +1,23 @@
+class Solution:
+    def pushDominoes(self, dominoes: str) -> str:
+        dom = list(dominoes)
+        q = collections.deque()
+        for i, d in enumerate(dom):
+            if d != '.':
+                q.append((i, d))
+        
+        while q:
+            i, d = q.popleft()
+
+            if d == 'L' and i > 0 and dom[i - 1] == '.':
+                q.append((i - 1, 'L'))
+                dom[i - 1] = 'L'
+            elif d == 'R':
+                if i + 1 < len(dom) and dom[i + 1] == '.':
+                    if i + 2 < len(dom) and dom[i + 2] == 'L':
+                        q.popleft()
+                    else:
+                        q.append((i + 1, 'R'))
+                        dom[i + 1] = 'R'
+
+        return ''.join(dom)