public static void main ( String [ ] args ) throws Exception {
  int k = sc . nextInt ( ) ;
  int [ ] arr = new int [ k ] ;
  int max = Integer . MIN_VALUE ;
  int min = Integer . MAX_VALUE ;
  int maxIdx = - 1 ;
  int minIdx = - 1 ;
  for ( int i = 0 ;
  i < arr . length ;
  i ++ ) {
    arr [ i ] = sc . nextInt ( ) ;
    if ( arr [ i ] > max ) {
      max = arr [ i ] ;
      maxIdx = i ;
    }
    if ( arr [ i ] < min ) {
      min = arr [ i ] ;
      minIdx = i ;
    }
  }
  System . out . println ( k * 2 - 1 ) ;
  if ( Math . abs ( min ) > max ) {
    for ( int i = 0 ;
    i < k ;
    i ++ ) {
      System . out . println ( ( minIdx + 1 ) + " " + ( i + 1 ) ) ;
    }
    for ( int i = k ;
    i > 1 ;
    i -- ) {
      System . out . println ( i + " " + ( i - 1 ) ) ;
    }
  }
  else {
    for ( int i = 0 ;
    i < k ;
    i ++ ) {
      System . out . println ( ( maxIdx + 1 ) + " " + ( i + 1 ) ) ;
    }
    for ( int i = 1 ;
    i < k ;
    i ++ ) {
      System . out . println ( i + " " + ( i + 1 ) ) ;
    }
  }
}

public static void main ( String [ ] args ) throws Exception { int k = sc . nextInt ( ) ; int [ ] arr = new int [ k ] ; int max = Integer . MIN_VALUE ; int min = Integer . MAX_VALUE ; int maxIdx = - 1 ; int minIdx = - 1 ; for ( int i = 0 ; i < arr . length ; i ++ ) { arr [ i ] = sc . nextInt ( ) ; if ( arr [ i ] > max ) { max = arr [ i ] ; maxIdx = i ; } if ( arr [ i ] < min ) { min = arr [ i ] ; minIdx = i ; } } System . out . println ( k * 2 - 1 ) ; if ( Math . abs ( min ) > max ) { for ( int i = 0 ; i < k ; i ++ ) { System . out . println ( ( minIdx + 1 ) + " ▁ " + ( i + 1 ) ) ; } for ( int i = k ; i > 1 ; i -- ) { System . out . println ( i + " ▁ " + ( i - 1 ) ) ; } } else { for ( int i = 0 ; i < k ; i ++ ) { System . out . println ( ( maxIdx + 1 ) + " ▁ " + ( i + 1 ) ) ; } for ( int i = 1 ; i < k ; i ++ ) { System . out . println ( i + " ▁ " + ( i + 1 ) ) ; } } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) (throws (type_identifier)) body: (block (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))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (field_access object: (identifier) field: (identifier)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (field_access object: (identifier) field: (identifier)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (unary_expression operand: (decimal_integer_literal)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (unary_expression operand: (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: (field_access object: (identifier) field: (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)))) (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (identifier))))))) (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: (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 (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (string_literal)) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))))))))) (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)))))))))) 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 (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (string_literal)) right: (parenthesized_expression (binary_expression left: (identifier) right: (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 (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)))))))))))))