<pre class="shiki github-dark shaku"><code>function canWinStonePicking (n) { if (n % 3 === 1) { return "B"; } return "A"; }</code></pre>

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There is a pile of n (n > 0) stones. Player A and Player B take turns to pick 1 or 2 stones from the pile. A starts first. Who picks the last stone lo…