text: Else if left bracket is 0 then we find unbalanced right bracket and increment right bracket or if the expression is balanced then we decrement left
code: else { if ( left_brace == 0 ) { right_brace ++ ; } else { left_brace -- ; } } } ans = ceil ( left_brace / 2 ) + ceil ( right_brace / 2 ) ; return ans ; }