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1404-number-of-steps-to-reduce-a-number-in-binary-representation-to-one/README.md

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+<h2><a href="https://leetcode.com/problems/number-of-steps-to-reduce-a-number-in-binary-representation-to-one">1404. Number of Steps to Reduce a Number in Binary Representation to One</a></h2><h3>Medium</h3><hr><p>Given the binary representation of an integer as a string <code>s</code>, return <em>the number of steps to reduce it to </em><code>1</code><em> under the following rules</em>:</p>
+
+<ul>
+	<li>
+	<p>If the current number is even, you have to divide it by <code>2</code>.</p>
+	</li>
+	<li>
+	<p>If the current number is odd, you have to add <code>1</code> to it.</p>
+	</li>
+</ul>
+
+<p>It is guaranteed that you can always reach one for all test cases.</p>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> s = &quot;1101&quot;
+<strong>Output:</strong> 6
+<strong>Explanation:</strong> &quot;1101&quot; corressponds to number 13 in their decimal representation.
+Step 1) 13 is odd, add 1 and obtain 14.&nbsp;
+Step 2) 14 is even, divide by 2 and obtain 7.
+Step 3) 7 is odd, add 1 and obtain 8.
+Step 4) 8 is even, divide by 2 and obtain 4.&nbsp; 
+Step 5) 4 is even, divide by 2 and obtain 2.&nbsp;
+Step 6) 2 is even, divide by 2 and obtain 1.&nbsp; 
+</pre>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<pre>
+<strong>Input:</strong> s = &quot;10&quot;
+<strong>Output:</strong> 1
+<strong>Explanation:</strong> &quot;10&quot; corressponds to number 2 in their decimal representation.
+Step 1) 2 is even, divide by 2 and obtain 1.&nbsp; 
+</pre>
+
+<p><strong class="example">Example 3:</strong></p>
+
+<pre>
+<strong>Input:</strong> s = &quot;1&quot;
+<strong>Output:</strong> 0
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= s.length&nbsp;&lt;= 500</code></li>
+	<li><code>s</code> consists of characters &#39;0&#39; or &#39;1&#39;</li>
+	<li><code>s[0] == &#39;1&#39;</code></li>
+</ul>