ĐỪNG HỎI T ĐANG DỖI AI(NHIỀU LẮM)

\(\huge{\mathbf{{\color{#FF0000}I}{\color{#FF7F00}'}{\color{#FFFF00}a}{\color{#00FF00}m}}}\) \(\huge{\mathbf{{\color{#0000FF}u}{\color{#6A5ACD}o}{\color{#A020F0}u}}}\)

\(\huge{\mathbf{{\color{#FF0000}P}{\color{#FF7F00}r}{\color{#FFFF00}o}{\color{#00FF00}f}{\color{#0000FF}i}{\color{#6A5ACD}l}{\color{#A020F0}e}{\color{#FF0000}\ }{\color{#FF7F00}v}{\color{#FFFF00}i}{\color{#00FF00}e}{\color{#0000FF}w}{\color{#6A5ACD}\ }{\color{#A020F0}c}{\color{#FF0000}o}{\color{#FF7F00}u}{\color{#FFFF00}n}{\color{#00FF00}t}{\color{#0000FF}\mathord{:}}}}\)

\(d(n) = O\left(n \frac{\ln 2}{\ln \ln n}\right)\)

Best combo: Sqrt Decomp RARS with parallel integer packing + Pragma + Custom FastIO, blocksize = 256, with aligned p and lazy array