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Language: Quadratic Functions
Description You are to process a sequence of - Add a quadratic function
*f*(*x*) =*a*x^{2}+*bx*+*c*into the plane. - Compute the global minimum value of all the quadratic functions at
*x*:*min*{*f*(_{i}*x*)}.
Input The first line consists of one integer: *I a b c*: add a quadratic function into the plane. You can assume the coefficient of the linear term is the double of the quadratic term's.*Q x*: compute the global minimum value of all the quadratic functions at x:*min*{*f*(_{i}*x*)}. Before the query, there is at least a curve in the plane.
^{6}.Output For each computation query, print a line consisting of one integer which denotes the global minimum value. Assume the absolute values of the answers are no more than 2 × 10 Sample Input 2 I 1 2 1 Q 1 Sample Output 4 Source POJ Monthly--2007.10.06, Amber(hupo001)@POJ |

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