* @returns {number[]} nums1每个元素在nums2中对应的「下一个更大元素」，无则返回-1
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，详情可参考safew官方版本下载
Much of the frustration has been voiced online, particularly among Generation Z - those currently aged between 14 and 29.
append again has to allocate a new backing store, this time of size
const posToTime = new Map(); // 位置 → 到达终点的时间（避免重复计算）