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LeetCode solutions

1642. Water Bottles

My accepted Python solution to LeetCode problem 1642, Water Bottles, running in 0ms.

  • Difficulty: Easy
  • Python
  • Runtime 0ms
  • Memory 17.6MB

Read the problem on LeetCode View on GitHub

The problem statement is LeetCode’s and stays on their site. What follows is my accepted solution.

Python

Accepted on LeetCode — runtime 0ms, memory 17.6MB, accepted 2025-12-24.

python
class Solution:
    def numWaterBottles(self, numBottles: int, numExchange: int) -> int:
        total = numBottles
        empty = numBottles
        
        while empty >= numExchange:
            new_bottles = empty // numExchange
            total += new_bottles
            empty = empty % numExchange + new_bottles
        
        return total

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