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<h2><a href="https://leetcode.com/problems/find-the-winner-of-the-circular-game/">1823. Find the Winner of the Circular Game</a></h2><h3>Medium</h3><hr><div><p>There are <code>n</code> friends that are playing a game. The friends are sitting in a circle and are numbered from <code>1</code> to <code>n</code> in <strong>clockwise order</strong>. More formally, moving clockwise from the <code>i<sup>th</sup></code> friend brings you to the <code>(i+1)<sup>th</sup></code> friend for <code>1 <= i < n</code>, and moving clockwise from the <code>n<sup>th</sup></code> friend brings you to the <code>1<sup>st</sup></code> friend.</p> | ||
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<p>The rules of the game are as follows:</p> | ||
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<ol> | ||
<li><strong>Start</strong> at the <code>1<sup>st</sup></code> friend.</li> | ||
<li>Count the next <code>k</code> friends in the clockwise direction <strong>including</strong> the friend you started at. The counting wraps around the circle and may count some friends more than once.</li> | ||
<li>The last friend you counted leaves the circle and loses the game.</li> | ||
<li>If there is still more than one friend in the circle, go back to step <code>2</code> <strong>starting</strong> from the friend <strong>immediately clockwise</strong> of the friend who just lost and repeat.</li> | ||
<li>Else, the last friend in the circle wins the game.</li> | ||
</ol> | ||
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<p>Given the number of friends, <code>n</code>, and an integer <code>k</code>, return <em>the winner of the game</em>.</p> | ||
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<p> </p> | ||
<p><strong>Example 1:</strong></p> | ||
<img alt="" src="https://assets.leetcode.com/uploads/2021/03/25/ic234-q2-ex11.png" style="width: 500px; height: 345px;"> | ||
<pre><strong>Input:</strong> n = 5, k = 2 | ||
<strong>Output:</strong> 3 | ||
<strong>Explanation:</strong> Here are the steps of the game: | ||
1) Start at friend 1. | ||
2) Count 2 friends clockwise, which are friends 1 and 2. | ||
3) Friend 2 leaves the circle. Next start is friend 3. | ||
4) Count 2 friends clockwise, which are friends 3 and 4. | ||
5) Friend 4 leaves the circle. Next start is friend 5. | ||
6) Count 2 friends clockwise, which are friends 5 and 1. | ||
7) Friend 1 leaves the circle. Next start is friend 3. | ||
8) Count 2 friends clockwise, which are friends 3 and 5. | ||
9) Friend 5 leaves the circle. Only friend 3 is left, so they are the winner.</pre> | ||
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<p><strong>Example 2:</strong></p> | ||
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<pre><strong>Input:</strong> n = 6, k = 5 | ||
<strong>Output:</strong> 1 | ||
<strong>Explanation:</strong> The friends leave in this order: 5, 4, 6, 2, 3. The winner is friend 1. | ||
</pre> | ||
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<p> </p> | ||
<p><strong>Constraints:</strong></p> | ||
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<ul> | ||
<li><code>1 <= k <= n <= 500</code></li> | ||
</ul></div> |