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2225-find-players-with-zero-or-one-losses/README.md

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+<h2><a href="https://leetcode.com/problems/find-players-with-zero-or-one-losses/">2225. Find Players With Zero or One Losses</a></h2><h3>Medium</h3><hr><div><p>You are given an integer array <code>matches</code> where <code>matches[i] = [winner<sub>i</sub>, loser<sub>i</sub>]</code> indicates that the player <code>winner<sub>i</sub></code> defeated player <code>loser<sub>i</sub></code> in a match.</p>
+
+<p>Return <em>a list </em><code>answer</code><em> of size </em><code>2</code><em> where:</em></p>
+
+<ul>
+	<li><code>answer[0]</code> is a list of all players that have <strong>not</strong> lost any matches.</li>
+	<li><code>answer[1]</code> is a list of all players that have lost exactly <strong>one</strong> match.</li>
+</ul>
+
+<p>The values in the two lists should be returned in <strong>increasing</strong> order.</p>
+
+<p><strong>Note:</strong></p>
+
+<ul>
+	<li>You should only consider the players that have played <strong>at least one</strong> match.</li>
+	<li>The testcases will be generated such that <strong>no</strong> two matches will have the <strong>same</strong> outcome.</li>
+</ul>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+
+<pre><strong>Input:</strong> matches = [[1,3],[2,3],[3,6],[5,6],[5,7],[4,5],[4,8],[4,9],[10,4],[10,9]]
+<strong>Output:</strong> [[1,2,10],[4,5,7,8]]
+<strong>Explanation:</strong>
+Players 1, 2, and 10 have not lost any matches.
+Players 4, 5, 7, and 8 each have lost one match.
+Players 3, 6, and 9 each have lost two matches.
+Thus, answer[0] = [1,2,10] and answer[1] = [4,5,7,8].
+</pre>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<pre><strong>Input:</strong> matches = [[2,3],[1,3],[5,4],[6,4]]
+<strong>Output:</strong> [[1,2,5,6],[]]
+<strong>Explanation:</strong>
+Players 1, 2, 5, and 6 have not lost any matches.
+Players 3 and 4 each have lost two matches.
+Thus, answer[0] = [1,2,5,6] and answer[1] = [].
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= matches.length &lt;= 10<sup>5</sup></code></li>
+	<li><code>matches[i].length == 2</code></li>
+	<li><code>1 &lt;= winner<sub>i</sub>, loser<sub>i</sub> &lt;= 10<sup>5</sup></code></li>
+	<li><code>winner<sub>i</sub> != loser<sub>i</sub></code></li>
+	<li>All <code>matches[i]</code> are <strong>unique</strong>.</li>
+</ul>
+</div>