mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-11-04 19:53:12 +08:00
30 lines
1.5 KiB
HTML
30 lines
1.5 KiB
HTML
<p>Given a string <code>s</code> containing only three types of characters: <code>'('</code>, <code>')'</code> and <code>'*'</code>, return <code>true</code> <em>if</em> <code>s</code> <em>is <strong>valid</strong></em>.</p>
|
|
|
|
<p>The following rules define a <strong>valid</strong> string:</p>
|
|
|
|
<ul>
|
|
<li>Any left parenthesis <code>'('</code> must have a corresponding right parenthesis <code>')'</code>.</li>
|
|
<li>Any right parenthesis <code>')'</code> must have a corresponding left parenthesis <code>'('</code>.</li>
|
|
<li>Left parenthesis <code>'('</code> must go before the corresponding right parenthesis <code>')'</code>.</li>
|
|
<li><code>'*'</code> could be treated as a single right parenthesis <code>')'</code> or a single left parenthesis <code>'('</code> or an empty string <code>""</code>.</li>
|
|
</ul>
|
|
|
|
<p> </p>
|
|
<p><strong class="example">Example 1:</strong></p>
|
|
<pre><strong>Input:</strong> s = "()"
|
|
<strong>Output:</strong> true
|
|
</pre><p><strong class="example">Example 2:</strong></p>
|
|
<pre><strong>Input:</strong> s = "(*)"
|
|
<strong>Output:</strong> true
|
|
</pre><p><strong class="example">Example 3:</strong></p>
|
|
<pre><strong>Input:</strong> s = "(*))"
|
|
<strong>Output:</strong> true
|
|
</pre>
|
|
<p> </p>
|
|
<p><strong>Constraints:</strong></p>
|
|
|
|
<ul>
|
|
<li><code>1 <= s.length <= 100</code></li>
|
|
<li><code>s[i]</code> is <code>'('</code>, <code>')'</code> or <code>'*'</code>.</li>
|
|
</ul>
|