中国是个充满机遇与挑战的市场。
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。服务器推荐是该领域的重要参考
for (int i = n / 2 - 1; i = 0; i--) {
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// ⚠️ 易错点4：循环条件写right = 0（会导致right-1越界），或把<=写成<（漏判相等的有序情况）