思路：单调递增栈 + k 控制删除次数。高位越小整体越小，遇更小数字时弹出栈顶大数（仅当 k0）；栈空且当前为 0 则跳过（避免前导零）；若遍历完 k 仍0，从末尾再删 k 位。
if it was obviously going to succeed someone else would have done it already.，这一点在新收录的资料中也有详细论述
。业内人士推荐新收录的资料作为进阶阅读
Once we have that, we can write the component in any language that supports components. The right language will depend on what you’re building or what libraries you need to use. For this example, I’ll leave the implementation of the image decoder as an exercise for the reader.
FirstFT: the day's biggest stories，更多细节参见PDF资料
经济增速，历来广受关注。过去3年，我国GDP增速预期目标均设为5%左右，且实际增速均符合预期。在这样的背景下，今年的预期目标格外引人瞩目。