2021年，關恆開始思考前往美國的方法。當時，「走線」的方式仍未在中國人之間流行起來。他在研究資料之後，決定先到香港，然後飛往對中國免簽證的厄瓜多爾，再到巴哈馬，並在巴哈馬處購買了小型充氣船，在海上漂流近23小時後，偷渡進了美國的佛羅里達州。
* 时间复杂度: O(nlogn) 空间复杂度: O(n) 稳定: ✓
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There’s three parts to this:
The writer G.K. Chesterton once said that before you knock anything down, you ought to know how it got there in the first place. So before we show for-profit publishers the pointy end of a pitchfork, we ought to know where they came from and why they persist.
exposed at the time the package was developed. In essence, this means