max(min{x1,x2,⋯ ,xn},y)=min{max(x1,y),max(x2,y),⋯ ,max(xn,y)}\max(\min\{x_1,x_2,\cdots,x_n\},y) = \min\{\max(x_1,y),\max(x_2,y),\cdots,\max(x_n,y)\}max(min{x1,x2,⋯,xn},y)=min{max(x1,y),max(x2,y),⋯,max(xn,y)}
min(max{x1,x2,⋯ ,xn},y)=max{min(x1,y),min(x2,y),⋯ ,min(xn,y)}\min(\max\{x_1,x_2,\cdots,x_n\},y) = \max\{\min(x_1,y),\min(x_2,y),\cdots,\min(x_n,y)\}min(max{x1,x2,⋯,xn},y)=max{min(x1,y),min(x2,y),⋯,min(xn,y)}
