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如果m1=m2=m3=Xm_1=m_2=m_3=Xm1=m2=m3=X,那么n=lcm(x1,x2,x3)⋅i+Xn=lcm(x_1,x_2,x_3)\cdot i+Xn=lcm(x1,x2,x3)⋅i+X
