Update 0322.零钱兑换.md

添加 python3 版本代码

Author: haofengsiji

problems/0322.零钱兑换.md

@@ -35,7 +35,7 @@
 示例 5：
 输入：coins = [1], amount = 2
 输出：2
- 
+
 提示：
 
 * 1 <= coins.length <= 12
@@ -209,6 +209,36 @@ class Solution {
 
 Python：
 
+```python3
+class Solution:
+    def coinChange(self, coins: List[int], amount: int) -> int:
+        '''版本一'''
+        # 初始化
+        dp = [amount + 1]*(amount + 1)
+        dp[0] = 0
+        # 遍历物品
+        for coin in coins:
+            # 遍历背包
+            for j in range(coin, amount + 1):
+                dp[j] = min(dp[j], dp[j - coin] + 1)
+        return dp[amount] if dp[amount] < amount + 1 else -1
+    
+    def coinChange1(self, coins: List[int], amount: int) -> int:
+        '''版本二'''
+        # 初始化
+        dp = [amount + 1]*(amount + 1)
+        dp[0] = 0
+        # 遍历物品
+        for j in range(1, amount + 1):
+            # 遍历背包
+            for coin in coins:
+                if j >= coin:
+                	dp[j] = min(dp[j], dp[j - coin] + 1)
+        return dp[amount] if dp[amount] < amount + 1 else -1
+```
+
+
+
 
 Go：
 ```go