Merge pull request #88 from LiangDazhu/master

添加 0122.买卖股票的最佳时机II 0055.跳跃游戏 python版本

problems/0055.跳跃游戏.md

@@ -107,7 +107,19 @@ class Solution {
 ```
 
 Python：
-
+```python
+class Solution:
+    def canJump(self, nums: List[int]) -> bool:
+        cover = 0
+        if len(nums) == 1: return True
+        i = 0
+        # python不支持动态修改for循环中变量,使用while循环代替
+        while i <= cover:
+            cover = max(i + nums[i], cover)
+            if cover >= len(nums) - 1: return True
+            i += 1
+        return False
+```
 
 Go：
 

problems/0122.买卖股票的最佳时机II.md

@@ -154,7 +154,14 @@ class Solution {
 ```
 
 Python：
-
+```python
+class Solution:
+    def maxProfit(self, prices: List[int]) -> int:
+        result = 0
+        for i in range(1, len(prices)):
+            result += max(prices[i] - prices[i - 1], 0)
+        return result
+```
 
 Go：