Solution for 332.

solution/0300-0399/0332.Reconstruct Itinerary/README.md

@@ -57,6 +57,23 @@
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```python
+class Solution:
+    def findItinerary(self, tickets: List[List[str]]) -> List[str]:
+        graph = defaultdict(list)
+
+        for src, dst in sorted(tickets, reverse=True):
+            graph[src].append(dst)
+
+        itinerary = []
+
+        def dfs(airport):
+            while graph[airport]:
+                dfs(graph[airport].pop())
+            itinerary.append(airport)
+
+        dfs("JFK")
+
+        return itinerary[::-1]
 
 ```
 

solution/0300-0399/0332.Reconstruct Itinerary/README_EN.md

@@ -49,6 +49,23 @@
 ### **Python3**
 
 ```python
+class Solution:
+    def findItinerary(self, tickets: List[List[str]]) -> List[str]:
+        graph = defaultdict(list)
+
+        for src, dst in sorted(tickets, reverse=True):
+            graph[src].append(dst)
+
+        itinerary = []
+
+        def dfs(airport):
+            while graph[airport]:
+                dfs(graph[airport].pop())
+            itinerary.append(airport)
+
+        dfs("JFK")
+
+        return itinerary[::-1]
 
 ```
 

solution/0300-0399/0332.Reconstruct Itinerary/Solution.py

@@ -0,0 +1,17 @@
+class Solution:
+    def findItinerary(self, tickets: List[List[str]]) -> List[str]:
+        graph = defaultdict(list)
+
+        for src, dst in sorted(tickets, reverse=True):
+            graph[src].append(dst)
+
+        itinerary = []
+
+        def dfs(airport):
+            while graph[airport]:
+                dfs(graph[airport].pop())
+            itinerary.append(airport)
+
+        dfs("JFK")
+
+        return itinerary[::-1]

solution/0400-0499/0468.Validate IP Address/README.md

@@ -65,6 +65,33 @@
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```python
+class Solution:
+    def validIPAddress(self, IP: str) -> str:
+        if "." in IP:
+            segments = IP.split(".")
+            if len(segments) != 4:
+                return "Neither"
+            for segment in segments:
+                if (
+                    not segment.isdigit()
+                    or not 0 <= int(segment) <= 255
+                    or (segment[0] == "0" and len(segment) > 1)
+                ):
+                    return "Neither"
+            return "IPv4"
+        elif ":" in IP:
+            segments = IP.split(":")
+            if len(segments) != 8:
+                return "Neither"
+            for segment in segments:
+                if (
+                    not segment
+                    or len(segment) > 4
+                    or not all(c in string.hexdigits for c in segment)
+                ):
+                    return "Neither"
+            return "IPv6"
+        return "Neither"
 
 ```
 

solution/0400-0499/0468.Validate IP Address/README_EN.md

@@ -57,6 +57,33 @@
 ### **Python3**
 
 ```python
+class Solution:
+    def validIPAddress(self, IP: str) -> str:
+        if "." in IP:
+            segments = IP.split(".")
+            if len(segments) != 4:
+                return "Neither"
+            for segment in segments:
+                if (
+                    not segment.isdigit()
+                    or not 0 <= int(segment) <= 255
+                    or (segment[0] == "0" and len(segment) > 1)
+                ):
+                    return "Neither"
+            return "IPv4"
+        elif ":" in IP:
+            segments = IP.split(":")
+            if len(segments) != 8:
+                return "Neither"
+            for segment in segments:
+                if (
+                    not segment
+                    or len(segment) > 4
+                    or not all(c in string.hexdigits for c in segment)
+                ):
+                    return "Neither"
+            return "IPv6"
+        return "Neither"
 
 ```
 

solution/0400-0499/0468.Validate IP Address/Solution.py

@@ -0,0 +1,27 @@
+class Solution:
+    def validIPAddress(self, IP: str) -> str:
+        if "." in IP:
+            segments = IP.split(".")
+            if len(segments) != 4:
+                return "Neither"
+            for segment in segments:
+                if (
+                    not segment.isdigit()
+                    or not 0 <= int(segment) <= 255
+                    or (segment[0] == "0" and len(segment) > 1)
+                ):
+                    return "Neither"
+            return "IPv4"
+        elif ":" in IP:
+            segments = IP.split(":")
+            if len(segments) != 8:
+                return "Neither"
+            for segment in segments:
+                if (
+                    not segment
+                    or len(segment) > 4
+                    or not all(c in string.hexdigits for c in segment)
+                ):
+                    return "Neither"
+            return "IPv6"
+        return "Neither"