Is coming on April 1, Vayko think a good way to fool, gifts.Hey hey, don t think too good, this gift is not so simple, Vayko to fool, prepared a pile of boxes, including a box filled with gifts.Box can put zero or more box.Assuming that put gift box is no longer put other box. B in () a box, gifts, said Vayko want you to help her figure out the fool index, namely the least how much need to open a box to get gift. Input: This topic contains multiple sets of test, please process to the end of the file. Each group test consists of a length is not more than 1000, contains only ( , ) and B three character string, representative Vayko gift design perspective. You can assume that, each perspective drawing is legal. Output: For each set of test, please within a line output index of fools. The sample input: (((((B)))))) (B) The sample output: 4 1

14号A卷第二题.txt

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