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<h2><a href="https://leetcode.com/problems/number-of-steps-to-reduce-a-number-to-zero/">1342. Number of Steps to Reduce a Number to Zero</a></h2><h3>Easy</h3><hr><div><p>Given an integer <code>num</code>, return <em>the number of steps to reduce it to zero</em>.</p> | ||
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<p>In one step, if the current number is even, you have to divide it by <code>2</code>, otherwise, you have to subtract <code>1</code> from it.</p> | ||
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<p> </p> | ||
<p><strong class="example">Example 1:</strong></p> | ||
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<pre><strong>Input:</strong> num = 14 | ||
<strong>Output:</strong> 6 | ||
<strong>Explanation:</strong> | ||
Step 1) 14 is even; divide by 2 and obtain 7. | ||
Step 2) 7 is odd; subtract 1 and obtain 6. | ||
Step 3) 6 is even; divide by 2 and obtain 3. | ||
Step 4) 3 is odd; subtract 1 and obtain 2. | ||
Step 5) 2 is even; divide by 2 and obtain 1. | ||
Step 6) 1 is odd; subtract 1 and obtain 0. | ||
</pre> | ||
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<p><strong class="example">Example 2:</strong></p> | ||
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<pre><strong>Input:</strong> num = 8 | ||
<strong>Output:</strong> 4 | ||
<strong>Explanation:</strong> | ||
Step 1) 8 is even; divide by 2 and obtain 4. | ||
Step 2) 4 is even; divide by 2 and obtain 2. | ||
Step 3) 2 is even; divide by 2 and obtain 1. | ||
Step 4) 1 is odd; subtract 1 and obtain 0. | ||
</pre> | ||
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<p><strong class="example">Example 3:</strong></p> | ||
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<pre><strong>Input:</strong> num = 123 | ||
<strong>Output:</strong> 12 | ||
</pre> | ||
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<p> </p> | ||
<p><strong>Constraints:</strong></p> | ||
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<ul> | ||
<li><code>0 <= num <= 10<sup>6</sup></code></li> | ||
</ul> | ||
</div> |