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leetcode-problemset/leetcode-cn/problem (Chinese)/买卖股票的最佳时机 [best-time-to-buy-and-sell-stock].html
2022-03-29 12:43:11 +08:00

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<p>给定一个数组 <code>prices</code> ,它的第 <code>i</code> 个元素 <code>prices[i]</code> 表示一支给定股票第 <code>i</code> 天的价格。</p>
<p>你只能选择 <strong>某一天</strong> 买入这只股票,并选择在 <strong>未来的某一个不同的日子</strong> 卖出该股票。设计一个算法来计算你所能获取的最大利润。</p>
<p>返回你可以从这笔交易中获取的最大利润。如果你不能获取任何利润,返回 <code>0</code></p>
<p> </p>
<p><strong>示例 1</strong></p>
<pre>
<strong>输入:</strong>[7,1,5,3,6,4]
<strong>输出:</strong>5
<strong>解释:</strong>在第 2 天(股票价格 = 1的时候买入在第 5 天(股票价格 = 6的时候卖出最大利润 = 6-1 = 5 。
注意利润不能是 7-1 = 6, 因为卖出价格需要大于买入价格;同时,你不能在买入前卖出股票。
</pre>
<p><strong>示例 2</strong></p>
<pre>
<strong>输入:</strong>prices = [7,6,4,3,1]
<strong>输出:</strong>0
<strong>解释:</strong>在这种情况下, 没有交易完成, 所以最大利润为 0。
</pre>
<p> </p>
<p><strong>提示:</strong></p>
<ul>
<li><code>1 <= prices.length <= 10<sup>5</sup></code></li>
<li><code>0 <= prices[i] <= 10<sup>4</sup></code></li>
</ul>