public static void main ( String [ ] $ ) {
  Scanner s = new Scanner ( System . in ) ;
  int n = s . nextInt ( ) ;
  int [ ] a = new int [ n ] ;
  Arrays . setAll ( a , i -> s . nextInt ( ) ) ;
  ArrayList < String > r = new ArrayList < > ( ) ;
  int m = 0 ;
  for ( int i = 1 ;
  i < n ;
  ++ i ) if ( Math . abs ( a [ m ] ) < Math . abs ( a [ i ] ) ) m = i ;
  for ( int i = 0 ;
  i < n ;
  ++ i ) if ( a [ m ] >= 0 ^ a [ i ] >= 0 ) r . add ( m + 1 + " " + ( i + 1 ) ) ;
  if ( a [ m ] >= 0 ) {
    for ( int i = 1 ;
    i < n ;
    ++ i ) r . add ( i + " " + ( i + 1 ) ) ;
  }
  else {
    for ( int i = n ;
    i > 1 ;
    -- i ) r . add ( i + " " + ( i - 1 ) ) ;
  }
  System . out . println ( r . size ( ) ) ;
  r . forEach ( System . out :: println ) ;
}

public static void main ( String [ ] $ ) { Scanner s = new Scanner ( System . in ) ; int n = s . nextInt ( ) ; int [ ] a = new int [ n ] ; Arrays . setAll ( a , i -> s . nextInt ( ) ) ; ArrayList < String > r = new ArrayList < > ( ) ; int m = 0 ; for ( int i = 1 ; i < n ; ++ i ) if ( Math . abs ( a [ m ] ) < Math . abs ( a [ i ] ) ) m = i ; for ( int i = 0 ; i < n ; ++ i ) if ( a [ m ] >= 0 ^ a [ i ] >= 0 ) r . add ( m + 1 + " ▁ " + ( i + 1 ) ) ; if ( a [ m ] >= 0 ) { for ( int i = 1 ; i < n ; ++ i ) r . add ( i + " ▁ " + ( i + 1 ) ) ; } else { for ( int i = n ; i > 1 ; -- i ) r . add ( i + " ▁ " + ( i - 1 ) ) ; } System . out . println ( r . size ( ) ) ; r . forEach ( System . out :: println ) ; }
(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: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (lambda_expression parameters: (identifier) body: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments)) arguments: (argument_list)))) (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: (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))))) consequence: (expression_statement (assignment_expression left: (identifier) right: (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: (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal)) right: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal)))) consequence: (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (string_literal)) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))) consequence: (block (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: (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (identifier) right: (string_literal)) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))))))))) alternative: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (identifier) right: (string_literal)) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal)))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_reference (field_access object: (identifier) field: (identifier)) (identifier)))))))