leetcode-problemset/leetcode-cn/problem (English)/得到 0 的操作数(English) [count-operations-to-obtain-zero].html

<p>You are given two <strong>non-negative</strong> integers <code>num1</code> and <code>num2</code>.</p>

<p>In one <strong>operation</strong>, if <code>num1 &gt;= num2</code>, you must subtract <code>num2</code> from <code>num1</code>, otherwise subtract <code>num1</code> from <code>num2</code>.</p>

<ul>
	<li>For example, if <code>num1 = 5</code> and <code>num2 = 4</code>, subtract <code>num2</code> from <code>num1</code>, thus obtaining <code>num1 = 1</code> and <code>num2 = 4</code>. However, if <code>num1 = 4</code> and <code>num2 = 5</code>, after one operation, <code>num1 = 4</code> and <code>num2 = 1</code>.</li>
</ul>

<p>Return <em>the <strong>number of operations</strong> required to make either</em> <code>num1 = 0</code> <em>or</em> <code>num2 = 0</code>.</p>

<p>&nbsp;</p>
<p><strong>Example 1:</strong></p>

<pre>
<strong>Input:</strong> num1 = 2, num2 = 3
<strong>Output:</strong> 3
<strong>Explanation:</strong> 
- Operation 1: num1 = 2, num2 = 3. Since num1 &lt; num2, we subtract num1 from num2 and get num1 = 2, num2 = 3 - 2 = 1.
- Operation 2: num1 = 2, num2 = 1. Since num1 &gt; num2, we subtract num2 from num1.
- Operation 3: num1 = 1, num2 = 1. Since num1 == num2, we subtract num2 from num1.
Now num1 = 0 and num2 = 1. Since num1 == 0, we do not need to perform any further operations.
So the total number of operations required is 3.
</pre>

<p><strong>Example 2:</strong></p>

<pre>
<strong>Input:</strong> num1 = 10, num2 = 10
<strong>Output:</strong> 1
<strong>Explanation:</strong> 
- Operation 1: num1 = 10, num2 = 10. Since num1 == num2, we subtract num2 from num1 and get num1 = 10 - 10 = 0.
Now num1 = 0 and num2 = 10. Since num1 == 0, we are done.
So the total number of operations required is 1.
</pre>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>0 &lt;= num1, num2 &lt;= 10<sup>5</sup></code></li>
</ul>