update project structure

leetcode_py/14.py

@@ -0,0 +1,19 @@
+# find the longest common prefix
+# 1 <= strs.length <= 200
+# 0 <=strs[i].length <= 200
+# only lowercase
+class Solution:
+    def longestCommonPrefix(self, strs: list[str]) -> str:
+        return_string = ""
+        i = 0
+        while i < len(strs[0]):
+            try:
+                for string in strs:
+                    if string[i] != strs[0][i]:
+                        return return_string
+                return_string += strs[0][i]
+                i += 1
+            except:
+                return return_string
+
+        return return_string