$2^{64}$ 会爆 ull
by KellyFrog @ 2020-11-02 21:53:45
把i的类型改一下？（
by 蒟蒻炒扇贝 @ 2020-11-02 21:53:47
`1ull << i + 1ull`
当`n=64,i=63`的时候会爆
要取膜的话建议改成`&((1ull<<i+1)-1)`
by crpboy @ 2020-11-02 22:01:32