问题：给定数组 nums，返回等长数组，res[i] 为 nums[i] 右侧第一个更大元素，没有则 -1。
Like hundreds of farmers and citizens of rural towns perched on the slopes of Europe’s highest and most active volcano, the 41-year-old’s family has had to deal with the nuisance of falling volcanic ash for generations. But it is only in recent years that the quantity of ash has become so excessive that it required an alternative approach.
，这一点在WPS下载最新地址中也有详细论述
SAT problem with 14 variables and 126 clauses
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