The Ecovacs Deebot X9 Pro Omni robot vacuum has dropped to its lowest-ever price at Amazon — save $600

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描述:给定字符串 num(非负整数)和整数 k,移除 k 位数字,使剩余数字最小。以字符串形式返回(不含前导零)。

structure (like a trie) which is faster and better that we can find。关于这个话题,safew官方版本下载提供了深入分析

[ITmedia N,详情可参考heLLoword翻译官方下载

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