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\begin{verse} I once used bool, I once used int,\ But memory cried and time took a hint.\ Then from the depths of header files,\ Came bitset, clad in leaner styles.\ \ A thousand bits — all packed in tight,\ Just one line, and it runs like light.\ With \texttt{.set()}, \texttt{.reset()}, \texttt{.flip()} so quick,\ You tilt the board and grab that trick.\ \ Forget your map, your vector\texttt{},\ This knight holds power, heart, and soul.\ No extra space, no looping pain —\ It shifts and slices in constant gain.\ \ You dream of masks, of states compressed,\ Of subset sums that must be guessed —\ In scoreboard’s glow, beneath the stress,\ bitset brings your code finesse.\ \ It sorts your dreams, your DP grids,\ It dances through those primal ids.\ It’s just one word, so short, so small —\ Yet mighty in the problem hall.\ \ Still rookies scoff and walk on by,\ "Too weird," they shrug, and never try.\ But those who’ve flipped that final bit,\ Know where true coding legends sit.\ \ So here’s to you, O silent king,\ Who makes our code so sharply sing.\ From 0 to 1, then back again —\ bitset, you're worth a thousand when.\ \end{verse}

\vspace{1.5em} \textbf{TL;DR:}\ Normal people use \texttt{bool}.\ Legends use \texttt{bitset}.\ Less memory. Faster ops. Cleaner code.\ You haven’t truly coded until you’ve \texttt{.flip()}ped your bits... and passed that last test.

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