feat: add python and java solutions to lcci question: 16.01.Swap Numbers

Solutions: https://lc.netlify.com/#/lcci/16.01.Swap%20Numbers/README

Author: yanglbme

lcci/16.01.Swap Numbers/README.md

@@ -15,20 +15,30 @@
 
 ## 解法
 <!-- 这里可写通用的实现逻辑 -->
-
+异或运算。
 
 ### Python3
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```python
-
+class Solution:
+    def swapNumbers(self, numbers: List[int]) -> List[int]:
+        numbers[0], numbers[1] = numbers[1], numbers[0]
+        return numbers
 ```
 
 ### Java
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```java
-
+class Solution {
+    public int[] swapNumbers(int[] numbers) {
+        numbers[0] = numbers[0] ^ numbers[1];
+        numbers[1] = numbers[0] ^ numbers[1];
+        numbers[0] = numbers[0] ^ numbers[1];
+        return numbers;
+    }
+}
 ```
 
 ### ...

lcci/16.01.Swap Numbers/README_EN.md

@@ -36,13 +36,23 @@
 ### Python3
 
 ```python
-
+class Solution:
+    def swapNumbers(self, numbers: List[int]) -> List[int]:
+        numbers[0], numbers[1] = numbers[1], numbers[0]
+        return numbers
 ```
 
 ### Java
 
 ```java
-
+class Solution {
+    public int[] swapNumbers(int[] numbers) {
+        numbers[0] = numbers[0] ^ numbers[1];
+        numbers[1] = numbers[0] ^ numbers[1];
+        numbers[0] = numbers[0] ^ numbers[1];
+        return numbers;
+    }
+}
 ```
 
 ### ...

lcci/16.01.Swap Numbers/Solution.java

@@ -0,0 +1,8 @@
+class Solution {
+    public int[] swapNumbers(int[] numbers) {
+        numbers[0] = numbers[0] ^ numbers[1];
+        numbers[1] = numbers[0] ^ numbers[1];
+        numbers[0] = numbers[0] ^ numbers[1];
+        return numbers;
+    }
+}

lcci/16.01.Swap Numbers/Solution.py

@@ -0,0 +1,4 @@
+class Solution:
+    def swapNumbers(self, numbers: List[int]) -> List[int]:
+        numbers[0], numbers[1] = numbers[1], numbers[0]
+        return numbers