Why is this a problem?
// 入栈后栈仍保持单调递增（因为小的都被弹走了），更多细节参见搜狗输入法2026
。业内人士推荐夫子作为进阶阅读
Ready for the answers? This is your last chance to turn back and solve today's puzzle before we reveal the solutions.，这一点在safew官方下载中也有详细论述
for (let i = 0; i < n; i++) {
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