1518. Water Bottles - Easy
문제
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.
제한사항`
- 1 <= numBottles <= 100
- 2 <= numExchange <= 100
입출력 예
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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.
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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.
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Example 3:
Input: numBottles = 5, numExchange = 5
Output: 6
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Example 4:
Input: numBottles = 2, numExchange = 3
Output: 2
풀이
- Math
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func numWaterBottles(numBottles int, numExchange int) int {
sum := numBottles
for numBottles / numExchange != 0 {
drink := numBottles / numExchange
remainBottle := numBottles % numExchange
sum += drink
numBottles = drink + remainBottle
}
return sum
}