Brackets all over

#1

sample input

4 2
((

sample output

1
how answer for above test case is 1

#2

(()) this is a string of length 4, and satisfy both the properties

  1. number of opening brackets at every index greater than closing brackets(except ofcourse the last index)
  2. number of opening brackets is 2 and closing brackets is 2, so they are equal
    a=" "(empty string), b = “((”, c = “))”
    a+b+c = “” + “((” + “))” = " (()) "
#3

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