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python 0860.柠檬水找零 去除无用变量
python 0860.柠檬水找零 去除无用变量:在本题中,20的数量是无用的,因为不需要用来找零,可以不用维护这个变量。
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@ -157,7 +157,7 @@ class Solution {
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```python
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class Solution:
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def lemonadeChange(self, bills: List[int]) -> bool:
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five, ten, twenty = 0, 0, 0
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five, ten = 0, 0
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for bill in bills:
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if bill == 5:
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five += 1
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@ -169,10 +169,8 @@ class Solution:
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if ten > 0 and five > 0:
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ten -= 1
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five -= 1
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twenty += 1
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elif five > 2:
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five -= 3
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twenty += 1
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else:
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return False
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return True
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