Create counting-words-with-a-given-prefix.py

Author: kamyu104

Python/counting-words-with-a-given-prefix.py

@@ -0,0 +1,12 @@
+# Time:  O(n * p)
+# Space: O(1)
+
+# string
+class Solution(object):
+    def prefixCount(self, words, pref):
+        """
+        :type words: List[str]
+        :type pref: str
+        :rtype: int
+        """
+        return sum(x.startswith(pref) for x in words)