# LeetCode - 0860. Lemonade Change
### 題目網址：https://leetcode.com/problems/lemonade-change/
###### tags: `LeetCode` `Easy` `模擬`

/*
    -LeetCode format-
    Problem: 860. Lemonade Change
    Difficulty: Easy
    
    by Inversionpeter
*/



class Solution {
public:
    bool lemonadeChange(vector<int>& bills) {
        int counts5 = 0, counts10 = 0;
        for (int &i : bills)
            if (i == 5)
                ++counts5;
            else if (i == 10) {
                if (!counts5)
                    return false;
                --counts5; ++counts10;
            }
            else {
                if (counts10 && counts5)
                    --counts10, --counts5;
                else if (counts5 >= 3)
                    counts5 -= 3;
                else
                    return false;
            }
        return true;
    }
};