public static void main ( String [ ] args ) throws IOException {
  BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  int t = Integer . parseInt ( br . readLine ( ) ) ;
  while ( t -- > 0 ) {
    int [ ] ab = Arrays . stream ( br . readLine ( ) . split ( "\\s+" ) ) . mapToInt ( Integer :: parseInt ) . toArray ( ) ;
    System . out . println ( ab [ 0 ] == ab [ 1 ] ? 0 : ab [ 0 ] < ab [ 1 ] ? ( ( ab [ 1 ] - ab [ 0 ] - 1 ) & 1 ) + 1 : ( ( ab [ 0 ] - ab [ 1 ] ) & 1 ) + 1 ) ;
  }
}

public static void main ( String [ ] args ) throws IOException { BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ; int t = Integer . parseInt ( br . readLine ( ) ) ; while ( t -- > 0 ) { int [ ] ab = Arrays . stream ( br . readLine ( ) . split ( " \\ s + " ) ) . mapToInt ( Integer :: parseInt ) . toArray ( ) ; System . out . println ( ab [ 0 ] == ab [ 1 ] ? 0 : ab [ 0 ] < ab [ 1 ] ? ( ( ab [ 1 ] - ab [ 0 ] - 1 ) & 1 ) + 1 : ( ( ab [ 0 ] - ab [ 1 ] ) & 1 ) + 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: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (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 (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (while_statement condition: (parenthesized_expression (binary_expression left: (update_expression (identifier)) right: (decimal_integer_literal))) body: (block (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list (string_literal))))) name: (identifier) arguments: (argument_list (method_reference (identifier) (identifier)))) name: (identifier) arguments: (argument_list)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (ternary_expression condition: (binary_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (array_access array: (identifier) index: (decimal_integer_literal))) consequence: (decimal_integer_literal) alternative: (ternary_expression condition: (binary_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (array_access array: (identifier) index: (decimal_integer_literal))) consequence: (binary_expression left: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (array_access array: (identifier) index: (decimal_integer_literal))) right: (decimal_integer_literal))) right: (decimal_integer_literal))) right: (decimal_integer_literal)) alternative: (binary_expression left: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (array_access array: (identifier) index: (decimal_integer_literal)))) right: (decimal_integer_literal))) right: (decimal_integer_literal)))))))))))