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建议添加到 状压 DP 页面。 例题:洛谷 P5911。
暴力枚举集合并判断是否是其子集是 O(4^n) 的,但总共的子集只有 3^n 个(可用二项式定理证明)。
O(3^n) 代码如下:
for (int i = 1; i < (1 << n); ++i) for (int j = i; j; j = (j - 1) & i) // Do something...
The text was updated successfully, but these errors were encountered:
感谢你对 OI Wiki 的关注!记得在 Issue 中表达清楚自己的意思哦~
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重复 #4991
另外这俩都已经写了,要么调整文章结构,要么可能是非必要的
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页面英文名
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我希望能添加的内容是
建议添加到 状压 DP 页面。
例题:洛谷 P5911。
我了解到的相关参考资料有
暴力枚举集合并判断是否是其子集是 O(4^n) 的,但总共的子集只有 3^n
个(可用二项式定理证明)。
O(3^n) 代码如下:
The text was updated successfully, but these errors were encountered: