public static void main ( String [ ] args ) {
  Scanner in = new Scanner ( System . in ) ;
  int t = in . nextInt ( ) ;
  while ( t > 0 ) {
    t -- ;
    long a = in . nextLong ( ) ;
    long b = in . nextLong ( ) ;
    long difference ;
    long x ;
    if ( a == b ) System . out . println ( 0 ) ;
    else {
      difference = Math . abs ( b - a ) ;
      x = difference / 10 ;
      if ( difference % 10 == 0 ) System . out . println ( x ) ;
      else System . out . println ( x + 1 ) ;
    }
  }
}

public static void main ( String [ ] args ) { Scanner in = new Scanner ( System . in ) ; int t = in . nextInt ( ) ; while ( t > 0 ) { t -- ; long a = in . nextLong ( ) ; long b = in . nextLong ( ) ; long difference ; long x ; if ( a == b ) System . out . println ( 0 ) ; else { difference = Math . abs ( b - a ) ; x = difference / 10 ; if ( difference % 10 == 0 ) System . out . println ( x ) ; else System . out . println ( x + 1 ) ; } } }
(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)))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (expression_statement (update_expression (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))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier))) (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 (decimal_integer_literal)))) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier)))))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (if_statement condition: (parenthesized_expression (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 (identifier)))) alternative: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal))))))))))))