add leetcode 14

leetcode/14.py

@@ -0,0 +1,21 @@
+# 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:
+    returnString = ""
+    index = 0
+    while i < len(str[0]):
+        try:
+            for string in strs:
+                if string[i] == strs[0][i]:
+                    i += 1
+                    returnString += string[i]
+                else:
+                    break
+        except:
+            break
+
+    return returnString
+