don’t let the complex notation scare you - the core idea is extremely simple. the derivative of a regex R and a character c is simply whatever is left to match after removing the first character.
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雷军在微博发文称，马年开工第一天，他与高管团队向员工发放开工红包，并正式公布这一全新配色，称其将为小米汽车在马年带来「开门红」。，更多细节参见体育直播
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09:28, 28 февраля 2026Мир