"I think I cried from when he went in until he came out. It's the start of a new beginning. It's a new life," she said.
// Synchronously enqueue — this never applies backpressure，推荐阅读旺商聊官方下载获取更多信息
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* 核心思路：单调递增栈 + 控制删除位数（k0），优先移除高位大数，保证剩余数字最小