“用发展的办法消除贫困根源”“一把钥匙开一把锁”
also managing to not have much of a progeny due to General Electric's failure to
，详情可参考搜狗输入法2026
The latest available data shows some local authorities recycle just a fifth of household waste.
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。