public static void main ( String [ ] args ) {
  SC sc = new SC ( System . in ) ;
  long N = sc . nextLong ( ) ;
  long X = sc . nextLong ( ) ;
  long sum = 0 ;
  if ( X > N / 2 ) {
    X = N - X ;
  }
  long big = N - X ;
  long mini = X ;
  sum = N ;
  while ( true ) {
    if ( big % mini != 0 ) {
      sum += mini * 2 * ( big / mini ) ;
      long tmp = mini ;
      mini = big % mini ;
      big = tmp ;
    }
    else {
      sum += mini * ( ( big / mini ) * 2 - 1 ) ;
      break ;
    }
  }
  pl ( sum ) ;
}

public static void main ( String [ ] args ) { SC sc = new SC ( System . in ) ; long N = sc . nextLong ( ) ; long X = sc . nextLong ( ) ; long sum = 0 ; if ( X > N / 2 ) { X = N - X ; } long big = N - X ; long mini = X ; sum = N ; while ( true ) { if ( big % mini != 0 ) { sum += mini * 2 * ( big / mini ) ; long tmp = mini ; mini = big % mini ; big = tmp ; } else { sum += mini * ( ( big / mini ) * 2 - 1 ) ; break ; } } pl ( sum ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (identifier)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) (expression_statement (assignment_expression left: (identifier) right: (identifier))) (while_statement condition: (parenthesized_expression (true)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (parenthesized_expression (binary_expression left: (identifier) right: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (identifier)))) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal)) right: (decimal_integer_literal)))))) (break_statement))))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier))))))