public static void main ( String [ ] args ) {
  Scanner input = new Scanner ( System . in ) ;
  long n = input . nextLong ( ) ;
  long k = input . nextLong ( ) ;
  if ( n % 2 != 0 ) {
    if ( k <= n / 2 + 1 ) System . out . println ( 2 * k - 1 ) ;
    else System . out . println ( 2 * ( k - n / 2 - 1 ) ) ;
  }
  else {
    if ( k <= n / 2 ) System . out . println ( 2 * k - 1 ) ;
    else System . out . println ( 2 * ( k - n / 2 ) ) ;
  }
  input . close ( ) ;
}

public static void main ( String [ ] args ) { Scanner input = new Scanner ( System . in ) ; long n = input . nextLong ( ) ; long k = input . nextLong ( ) ; if ( n % 2 != 0 ) { if ( k <= n / 2 + 1 ) System . out . println ( 2 * k - 1 ) ; else System . out . println ( 2 * ( k - n / 2 - 1 ) ) ; } else { if ( k <= n / 2 ) System . out . println ( 2 * k - 1 ) ; else System . out . println ( 2 * ( k - n / 2 ) ) ; } input . close ( ) ; }
(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)))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (decimal_integer_literal) right: (identifier)) right: (decimal_integer_literal))))) alternative: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (decimal_integer_literal) right: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal))))))))) alternative: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (decimal_integer_literal) right: (identifier)) right: (decimal_integer_literal))))) alternative: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (decimal_integer_literal) right: (parenthesized_expression (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))))))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))