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。
"It's a huge surprise because I've always been able to get a job very easily," said Trigg, who lives in Texas. "It wasn't even on my radar to be prepared for more than six months of unemployment. It wasn't in my universe."
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国务院财政、税务主管部门提出货物、服务、无形资产、不动产的具体范围，报国务院批准后公布施行。