Create count-asterisks.py

Author: kamyu104

Python/count-asterisks.py

@@ -0,0 +1,18 @@
+# Time:  O(n)
+# Space: O(1)
+
+# string
+class Solution(object):
+    def countAsterisks(self, s):
+        """
+        :type s: str
+        :rtype: int
+        """
+        result = cnt = 0
+        for c in s:
+            if c == '|':
+                cnt = (cnt+1)%2
+                continue
+            if c == '*' and cnt == 0:
+                result += 1
+        return result