示例：nums = [2,1,2,4,3] → res = [4,2,4,-1,-1]。
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，这一点在51吃瓜中也有详细论述
Thus, despite much effort, no gelling agent has yet been discovered that possesses all the properties and benefits of agar. Agar continues to be the best all-arounder: versatile, cheap, and established. And, if Gelidium agar should ever run out, and another colloid is not at hand, microbiologists could revert to culinary agar, which, although not as pure and transparent, offers a low-cost alternative to lab-grade agar.
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gefultumige good luck with this!