"Despite the fact that it strained everyone's attention spans, Trump expected everyone to leap to their feet and applaud for him, including the Democrats. And his feelings were very hurt when they didn't," said Meyers.
需求遍历弹出条件栈类型下一个更大元素的索引倒序栈顶 ≤ 当前 → 弹出严格单调递减栈下一个更大或相等元素的索引倒序栈顶 < 当前 → 弹出非严格单调递减栈下一个更小元素的索引倒序栈顶 ≥ 当前 → 弹出严格单调递增栈下一个更小或相等元素的索引倒序栈顶 当前 → 弹出非严格单调递增栈上一个更大元素的索引正序栈顶 ≤ 当前 → 弹出严格单调递减栈上一个更大或相等元素的索引正序栈顶 < 当前 → 弹出非严格单调递减栈上一个更小元素的索引正序栈顶 ≥ 当前 → 弹出严格单调递增栈上一个更小或相等元素的索引正序栈顶 当前 → 弹出非严格单调递增栈
，更多细节参见旺商聊官方下载
优先使用 ReLU 或其变种（Leaky ReLU, ELU, PReLU）
// ⚠️ 易错点3：此处返回n而非0（完全有序无需排序，长度为0）