public static void main ( String [ ] args ) throws IOException {
  BufferedReader reader = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  char [ ] arr = reader . readLine ( ) . toCharArray ( ) ;
  int n = arr . length ;
  boolean [ ] [ ] forward = new boolean [ n ] [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int cur = 0 ;
    boolean mark = true ;
    for ( int j = i ;
    j < n ;
    j ++ ) {
      if ( arr [ j ] == ')' ) cur -- ;
      else cur ++ ;
      if ( cur < 0 ) mark = false ;
      forward [ i ] [ j ] = mark ;
    }
  }
  boolean [ ] [ ] backward = new boolean [ n ] [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int cur = 0 ;
    boolean mark = true ;
    for ( int j = i ;
    j > - 1 ;
    j -- ) {
      if ( arr [ j ] == '(' ) cur -- ;
      else cur ++ ;
      if ( cur < 0 ) mark = false ;
      backward [ j ] [ i ] = mark ;
    }
  }
  int ans = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    for ( int j = i ;
    j < n ;
    j ++ ) {
      if ( forward [ i ] [ j ] && backward [ i ] [ j ] && ( j - i + 1 ) % 2 == 0 ) {
        ans ++ ;
      }
    }
  }
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) throws IOException { BufferedReader reader = new BufferedReader ( new InputStreamReader ( System . in ) ) ; char [ ] arr = reader . readLine ( ) . toCharArray ( ) ; int n = arr . length ; boolean [ ] [ ] forward = new boolean [ n ] [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { int cur = 0 ; boolean mark = true ; for ( int j = i ; j < n ; j ++ ) { if ( arr [ j ] == ' ) ' ) cur -- ; else cur ++ ; if ( cur < 0 ) mark = false ; forward [ i ] [ j ] = mark ; } } boolean [ ] [ ] backward = new boolean [ n ] [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { int cur = 0 ; boolean mark = true ; for ( int j = i ; j > - 1 ; j -- ) { if ( arr [ j ] == ' ( ' ) cur -- ; else cur ++ ; if ( cur < 0 ) mark = false ; backward [ j ] [ i ] = mark ; } } int ans = 0 ; for ( int i = 0 ; i < n ; i ++ ) { for ( int j = i ; j < n ; j ++ ) { if ( forward [ i ] [ j ] && backward [ i ] [ j ] && ( j - i + 1 ) % 2 == 0 ) { ans ++ ; } } } System . out . println ( ans ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) (throws (type_identifier)) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (field_access object: (identifier) field: (identifier)))) (local_variable_declaration type: (array_type element: (boolean_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (boolean_type) dimensions: (dimensions_expr (identifier)) dimensions: (dimensions_expr (identifier))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (true))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (character_literal))) consequence: (expression_statement (update_expression (identifier))) alternative: (expression_statement (update_expression (identifier)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (expression_statement (assignment_expression left: (identifier) right: (false)))) (expression_statement (assignment_expression left: (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier)) right: (identifier))))))) (local_variable_declaration type: (array_type element: (boolean_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (boolean_type) dimensions: (dimensions_expr (identifier)) dimensions: (dimensions_expr (identifier))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (true))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) condition: (binary_expression left: (identifier) right: (unary_expression operand: (decimal_integer_literal))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (character_literal))) consequence: (expression_statement (update_expression (identifier))) alternative: (expression_statement (update_expression (identifier)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (expression_statement (assignment_expression left: (identifier) right: (false)))) (expression_statement (assignment_expression left: (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier)) right: (identifier))))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier)) right: (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier))) right: (binary_expression left: (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))) right: (decimal_integer_literal)) right: (decimal_integer_literal)))) consequence: (block (expression_statement (update_expression (identifier))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))