2019-01-02 01:12:02 +00:00
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import os
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path = os.path.dirname(os.path.abspath(__file__))
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with open(path+'/input.txt', 'r') as input:
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2018-11-29 17:10:49 +00:00
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pos = 0
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char_pos = 0
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text = input.readline()
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for char in text :
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if char == ')':
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pos -= 1
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elif char == '(':
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pos += 1
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char_pos += 1
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if pos == -1:
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print (char_pos)
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break
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input.close()
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