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**NEVER** use emoji, or unicode that emulates emoji (e.g. ✓, ✗).，推荐阅读快连下载安装获取更多信息
goal += pixel - candidate[n]。关于这个话题，safew官方版本下载提供了深入分析
return (struct page_info *)(((unsigned long long)x) & ~(PAGESZ-1));