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0374-guess-number-higher-or-lower/README.md

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+<h2><a href="https://leetcode.com/problems/guess-number-higher-or-lower">374. Guess Number Higher or Lower</a></h2><h3>Easy</h3><hr><p>We are playing the Guess Game. The game is as follows:</p>
+
+<p>I pick a number from <code>1</code> to <code>n</code>. You have to guess which number I picked.</p>
+
+<p>Every time you guess wrong, I will tell you whether the number I picked is higher or lower than your guess.</p>
+
+<p>You call a pre-defined API <code>int guess(int num)</code>, which returns three possible results:</p>
+
+<ul>
+	<li><code>-1</code>: Your guess is higher than the number I picked (i.e. <code>num &gt; pick</code>).</li>
+	<li><code>1</code>: Your guess is lower than the number I picked (i.e. <code>num &lt; pick</code>).</li>
+	<li><code>0</code>: your guess is equal to the number I picked (i.e. <code>num == pick</code>).</li>
+</ul>
+
+<p>Return <em>the number that I picked</em>.</p>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> n = 10, pick = 6
+<strong>Output:</strong> 6
+</pre>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<pre>
+<strong>Input:</strong> n = 1, pick = 1
+<strong>Output:</strong> 1
+</pre>
+
+<p><strong class="example">Example 3:</strong></p>
+
+<pre>
+<strong>Input:</strong> n = 2, pick = 1
+<strong>Output:</strong> 1
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= n &lt;= 2<sup>31</sup> - 1</code></li>
+	<li><code>1 &lt;= pick &lt;= n</code></li>
+</ul>