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# 860. Lemonade Change

## Description

At a lemonade stand, each lemonade costs `$5`

.

Customers are standing in a queue to buy from you, and order one at a time (in the order specified by `bills`

).

Each customer will only buy one lemonade and pay with either a `$5`

, `$10`

, or `$20`

bill. You must provide the correct change to each customer, so that the net transaction is that the customer pays $5.

Note that you don't have any change in hand at first.

Return `true`

if and only if you can provide every customer with correct change.

**Example 1:**

Input:[5,5,5,10,20]Output:trueExplanation:From the first 3 customers, we collect three $5 bills in order. From the fourth customer, we collect a $10 bill and give back a $5. From the fifth customer, we give a $10 bill and a $5 bill. Since all customers got correct change, we output true.

**Example 2:**

Input:[5,5,10]Output:true

**Example 3:**

Input:[10,10]Output:false

**Example 4:**

Input:[5,5,10,10,20]Output:falseExplanation:From the first two customers in order, we collect two $5 bills. For the next two customers in order, we collect a $10 bill and give back a $5 bill. For the last customer, we can't give change of $15 back because we only have two $10 bills. Since not every customer received correct change, the answer is false.

**Note:**

`0 <= bills.length <= 10000`

`bills[i]`

will be either`5`

,`10`

, or`20`

.