new question added

Author: shushrutsharma

.gitignore

@@ -1,3 +1,5 @@
 .vscode/
 __pycache__/
-.DS_Store
+.DS_Store
+14. Questions/code.py
+14. Questions/temp.py

14. Questions/leetcode 28 - implement strStr().py

@@ -0,0 +1,24 @@
+"""
+Implement strStr().
+
+Given two strings needle and haystack, return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.
+
+Clarification:
+
+What should we return when needle is an empty string? This is a great question to ask during an interview.
+
+For the purpose of this problem, we will return 0 when needle is an empty string. This is consistent to C's strstr() and Java's indexOf().
+
+Question: https://leetcode.com/problems/implement-strstr/
+
+"""
+
+class Solution:
+        def strStr(self, haystack: str, needle: str) -> int:
+            if not needle:
+                return 0
+            
+            for i in range(len(haystack)):
+                if haystack[i:i+len(needle)] == needle:
+                    return i
+            return -1