Change the state of light i (if it's on, turn off it; if it is not on, turn on it) at t+1 second (t >= 0), if the left of light i is on !!!Change the state of light i (if it's on, tu
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hdu 2276 Kiki & Little Kiki 2 矩阵快速幂_weixin_33714884的博客
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