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items fits in our small stack-allocated buffer, we perform exactly 1
，更多细节参见新收录的资料
this.stack = []; // 核心：存储索引，保证索引对应的价格单调递减，详情可参考新收录的资料
除了老爸，家人都明说了最坏打算：如果牛真要死，就死在沟里，不麻烦村里人来抬。毕竟，在这么陡的坡上抬一头近800斤的牛，搞不好把人命搭进去。