mirror of
https://github.com/halfrost/LeetCode-Go.git
synced 2025-07-06 09:23:19 +08:00
74 lines
2.2 KiB
Markdown
74 lines
2.2 KiB
Markdown
# [1518. Water Bottles](https://leetcode.com/problems/water-bottles/)
|
||
|
||
## 题目
|
||
|
||
Given numBottles full water bottles, you can exchange numExchange empty water bottles for one full water bottle.
|
||
|
||
The operation of drinking a full water bottle turns it into an empty bottle.
|
||
|
||
Return the maximum number of water bottles you can drink.
|
||
|
||
**Example 1**:
|
||
|
||
|
||
|
||
Input: numBottles = 9, numExchange = 3
|
||
Output: 13
|
||
Explanation: You can exchange 3 empty bottles to get 1 full water bottle.
|
||
Number of water bottles you can drink: 9 + 3 + 1 = 13.
|
||
|
||
**Example 2**:
|
||
|
||
|
||
|
||
Input: numBottles = 15, numExchange = 4
|
||
Output: 19
|
||
Explanation: You can exchange 4 empty bottles to get 1 full water bottle.
|
||
Number of water bottles you can drink: 15 + 3 + 1 = 19.
|
||
|
||
**Example 3**:
|
||
|
||
Input: numBottles = 5, numExchange = 5
|
||
Output: 6
|
||
|
||
**Example 4**:
|
||
|
||
Input: numBottles = 2, numExchange = 3
|
||
Output: 2
|
||
|
||
**Constraints:**
|
||
|
||
- 1 <= numBottles <= 100
|
||
- 2 <= numExchange <= 100
|
||
|
||
## 题目大意
|
||
|
||
小区便利店正在促销，用 numExchange 个空酒瓶可以兑换一瓶新酒。你购入了 numBottles 瓶酒。
|
||
|
||
如果喝掉了酒瓶中的酒，那么酒瓶就会变成空的。
|
||
|
||
请你计算 最多 能喝到多少瓶酒。
|
||
|
||
## 解题思路
|
||
|
||
- 模拟。首先我们一定可以喝到 numBottles 瓶酒，剩下 numBottles 个空瓶。接下来我们可以拿空瓶子换酒，每次拿出 numExchange 个瓶子换一瓶酒，然后再喝完这瓶酒，得到一个空瓶。这样模拟下去，直到所有的空瓶子小于numExchange结束。
|
||
|
||
## 代码
|
||
|
||
```go
|
||
package leetcode
|
||
|
||
func numWaterBottles(numBottles int, numExchange int) int {
|
||
if numBottles < numExchange {
|
||
return numBottles
|
||
}
|
||
quotient := numBottles / numExchange
|
||
reminder := numBottles % numExchange
|
||
ans := numBottles + quotient
|
||
for quotient+reminder >= numExchange {
|
||
quotient, reminder = (quotient+reminder)/numExchange, (quotient+reminder)%numExchange
|
||
ans += quotient
|
||
}
|
||
return ans
|
||
}
|
||
``` |