Leet Code Daily 2024-07-07 - Water Bottles

class Solution {
public:
    int numWaterBottles(int numBottles, int numExchange) {
        int ans = numBottles;
        while (numBottles >= numExchange) {
            int t = numBottles / numExchange;
            ans += t;
            numBottles -= t * (numExchange - 1);
        }
        return ans;
    }
};