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。
To be clear, I say "little freaks" with nothing but admiration and love. The entire appeal of Pokémon, to me, is that every few years you get a couple hundred strange new creatures to look at and, eventually, learn to love. In fairness to all Pokémon, basically every single one of them is a weird little freak, but the 10 on this list go above and beyond. Lightning-powered mice are pretty weird, but not as weird as sentient ice cream cones, if you get what I'm saying.
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在山西运城市平陆三湾大天鹅景区栖息的白天鹅。