Update 0045.跳跃游戏II.md

Added python version code

problems/0045.跳跃游戏II.md

@@ -175,7 +175,22 @@ class Solution {
 ```
 
 Python：
-
+```python
+class Solution:
+    def jump(self, nums: List[int]) -> int:
+        if len(nums) == 1: return 0
+        ans = 0
+        curDistance = 0
+        nextDistance = 0
+        for i in range(len(nums)):
+            nextDistance = max(i + nums[i], nextDistance)
+            if i == curDistance: 
+                if curDistance != len(nums) - 1:
+                    ans += 1
+                    curDistance = nextDistance
+                    if nextDistance >= len(nums) - 1: break
+        return ans
+```
 
 Go：