public static void main ( String args [ ] ) throws Exception {
  Scanner sc = new Scanner ( System . in ) ;
  int N = sc . nextInt ( ) ;
  int [ ] A = new int [ N ] ;
  for ( int i = 0 ;
  i < N ;
  i ++ ) {
    A [ i ] = sc . nextInt ( ) ;
  }
  int pmaxnum = 0 ;
  int pmax = 0 ;
  int mmaxnum = 0 ;
  int mmax = 0 ;
  for ( int i = 0 ;
  i < N ;
  i ++ ) {
    if ( A [ i ] >= 0 ) {
      if ( pmax <= A [ i ] ) {
        pmax = A [ i ] ;
        pmaxnum = i + 1 ;
      }
    }
    else {
      if ( mmax >= A [ i ] ) {
        mmax = A [ i ] ;
        mmaxnum = i + 1 ;
      }
    }
  }
  System . out . println ( N * 2 - 2 ) ;
  if ( Math . abs ( pmax ) >= Math . abs ( mmax ) ) {
    for ( int i = 1 ;
    i <= N ;
    i ++ ) {
      if ( i != pmaxnum ) System . out . println ( pmaxnum + " " + i ) ;
    }
    for ( int i = 1 ;
    i < N ;
    i ++ ) {
      System . out . println ( i + " " + ( i + 1 ) ) ;
    }
  }
  else {
    for ( int i = 1 ;
    i <= N ;
    i ++ ) {
      if ( i != mmaxnum ) System . out . println ( mmaxnum + " " + i ) ;
    }
    for ( int i = N ;
    i > 1 ;
    i -- ) {
      System . out . println ( i + " " + ( i - 1 ) ) ;
    }
  }
}

public static void main ( String args [ ] ) throws Exception { Scanner sc = new Scanner ( System . in ) ; int N = sc . nextInt ( ) ; int [ ] A = new int [ N ] ; for ( int i = 0 ; i < N ; i ++ ) { A [ i ] = sc . nextInt ( ) ; } int pmaxnum = 0 ; int pmax = 0 ; int mmaxnum = 0 ; int mmax = 0 ; for ( int i = 0 ; i < N ; i ++ ) { if ( A [ i ] >= 0 ) { if ( pmax <= A [ i ] ) { pmax = A [ i ] ; pmaxnum = i + 1 ; } } else { if ( mmax >= A [ i ] ) { mmax = A [ i ] ; mmaxnum = i + 1 ; } } } System . out . println ( N * 2 - 2 ) ; if ( Math . abs ( pmax ) >= Math . abs ( mmax ) ) { for ( int i = 1 ; i <= N ; i ++ ) { if ( i != pmaxnum ) System . out . println ( pmaxnum + " ▁ " + i ) ; } for ( int i = 1 ; i < N ; i ++ ) { System . out . println ( i + " ▁ " + ( i + 1 ) ) ; } } else { for ( int i = 1 ; i <= N ; i ++ ) { if ( i != mmaxnum ) System . out . println ( mmaxnum + " ▁ " + i ) ; } for ( int i = N ; i > 1 ; i -- ) { System . out . println ( i + " ▁ " + ( i - 1 ) ) ; } } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier) dimensions: (dimensions))) (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 (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))))) (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 (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (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 (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))))) alternative: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))))) (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) 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: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (identifier) right: (string_literal)) 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: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (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: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (identifier) right: (string_literal)) right: (identifier)))))))) (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: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (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)))))))))))))