LeetCode Daily Problem P1518: Water Bottles

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Timeline

Timeline

2025-10-01

init

Math, simulation

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Problem:

P1518 Water Bottles

https://leetcode.cn/problems/water-bottles/description/?envType=daily-question&envId=2025-10-01

Simple math simulation problem

#include <stdio.h>
class Solution {
public:
  int numWaterBottles(int numBottles, int numExchange) {
    // For every numExchange empty bottles, you can exchange for one full bottle.
    int exchange_bootles = -1;
    int total_water = 0;
    do {
      exchange_bootles = numBottles / numExchange;
      numBottles = numBottles % numExchange;
      numBottles += exchange_bootles;
      total_water += exchange_bootles * numExchange;

    } while (numBottles >= numExchange);
    total_water += numBottles;
    return total_water;
  }
};