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View a PDF of the paper titled Flip Distance of Triangulations of Convex Polygons / Rotation Distance of Binary Trees is NP-complete, by Joseph Dorfer
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В России предупредили о скорой нехватке вагонов08:46，这一点在电影中也有详细论述
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Mediterranean Shipping Company, the world’s largest shipping firm, made a similar announcement on Sunday, directing all vessels operating in the Gulf region to move to designated safe shelter areas.