public static void main ( String [ ] args ) throws IOException {
  BufferedReader reader = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  PrintWriter printer = new PrintWriter ( new BufferedWriter ( new OutputStreamWriter ( System . out ) ) ) ;
  String str = reader . readLine ( ) ;
  int ans = 0 ;
  for ( int i = 0 ;
  i < str . length ( ) ;
  i ++ ) {
    int nO = 0 ;
    int nC = 0 ;
    loop2 : for ( int j = i ;
    j < str . length ( ) ;
    j ++ ) {
      if ( str . charAt ( j ) == '(' ) {
        nO ++ ;
      }
      else if ( str . charAt ( j ) == '?' ) {
        if ( nO > 0 ) {
          nO -- ;
          nC ++ ;
        }
        else {
          nO ++ ;
        }
      }
      else {
        if ( nO > 0 ) {
          nO -- ;
        }
        else if ( nC > 0 ) {
          nC -- ;
          nO ++ ;
        }
        else {
          break loop2 ;
        }
      }
      if ( nO == 0 ) {
        ans ++ ;
      }
    }
  }
  printer . println ( ans ) ;
  printer . close ( ) ;
}

public static void main ( String [ ] args ) throws IOException { BufferedReader reader = new BufferedReader ( new InputStreamReader ( System . in ) ) ; PrintWriter printer = new PrintWriter ( new BufferedWriter ( new OutputStreamWriter ( System . out ) ) ) ; String str = reader . readLine ( ) ; int ans = 0 ; for ( int i = 0 ; i < str . length ( ) ; i ++ ) { int nO = 0 ; int nC = 0 ; loop2 : for ( int j = i ; j < str . length ( ) ; j ++ ) { if ( str . charAt ( j ) == ' ( ' ) { nO ++ ; } else if ( str . charAt ( j ) == ' ? ' ) { if ( nO > 0 ) { nO -- ; nC ++ ; } else { nO ++ ; } } else { if ( nO > 0 ) { nO -- ; } else if ( nC > 0 ) { nC -- ; nO ++ ; } else { break loop2 ; } } if ( nO == 0 ) { ans ++ ; } } } printer . println ( ans ) ; printer . close ( ) ; }
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