1518. Water Bottles

1518.cs

public class Solution
{
    public int NumWaterBottles(int numBottles, int numExchange)
    {
        int ans = numBottles;

        while (numBottles >= numExchange)
        {
            numBottles -= numExchange;
            ans++;
            numBottles += 1;
        }

        return ans;
    }
}

1518.py

Python

class Solution(object):
    def numWaterBottles(self, numBottles, numExchange):
        """
        :type numBottles: int
        :type numExchange: int
        :rtype: int
        """

        ans = numBottles

        while numBottles >= numExchange:
            numBottles -= numExchange
            ans += 1
            numBottles += 1

        return ans

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