国外版

算法题（国外版）/maximum-population-year.html

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+<p>You are given a 2D integer array <code>logs</code> where each <code>logs[i] = [birth<sub>i</sub>, death<sub>i</sub>]</code> indicates the birth and death years of the <code>i<sup>th</sup></code> person.</p>
+
+<p>The <strong>population</strong> of some year <code>x</code> is the number of people alive during that year. The <code>i<sup>th</sup></code> person is counted in year <code>x</code>&#39;s population if <code>x</code> is in the <strong>inclusive</strong> range <code>[birth<sub>i</sub>, death<sub>i</sub> - 1]</code>. Note that the person is <strong>not</strong> counted in the year that they die.</p>
+
+<p>Return <em>the <strong>earliest</strong> year with the <strong>maximum population</strong></em>.</p>
+
+<p>&nbsp;</p>
+<p><strong>Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> logs = [[1993,1999],[2000,2010]]
+<strong>Output:</strong> 1993
+<strong>Explanation:</strong> The maximum population is 1, and 1993 is the earliest year with this population.
+</pre>
+
+<p><strong>Example 2:</strong></p>
+
+<pre>
+<strong>Input:</strong> logs = [[1950,1961],[1960,1971],[1970,1981]]
+<strong>Output:</strong> 1960
+<strong>Explanation:</strong> 
+The maximum population is 2, and it had happened in years 1960 and 1970.
+The earlier year between them is 1960.</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= logs.length &lt;= 100</code></li>
+	<li><code>1950 &lt;= birth<sub>i</sub> &lt; death<sub>i</sub> &lt;= 2050</code></li>
+</ul>