public static void main ( String [ ] args ) throws IOException {
  PrintWriter out = new PrintWriter ( System . out ) ;
  FastScanner fs = new FastScanner ( ) ;
  int tc = fs . nextInt ( ) ;
  for ( int _ = 0 ;
  _ < tc ;
  _ ++ ) {
    int A = fs . nextInt ( ) , B = fs . nextInt ( ) ;
    if ( A == B ) {
      out . println ( 0 ) ;
    }
    else if ( ( A > B && ( ( ( A - B ) & 1 ) ) == 0 ) || ( B > A && ( ( B - A ) & 1 ) == 1 ) ) {
      out . println ( 1 ) ;
    }
    else {
      out . println ( 2 ) ;
    }
  }
  out . close ( ) ;
}

public static void main ( String [ ] args ) throws IOException { PrintWriter out = new PrintWriter ( System . out ) ; FastScanner fs = new FastScanner ( ) ; int tc = fs . nextInt ( ) ; for ( int _ = 0 ; _ < tc ; _ ++ ) { int A = fs . nextInt ( ) , B = fs . nextInt ( ) ; if ( A == B ) { out . println ( 0 ) ; } else if ( ( A > B && ( ( ( A - B ) & 1 ) ) == 0 ) || ( B > A && ( ( B - A ) & 1 ) == 1 ) ) { out . println ( 1 ) ; } else { out . println ( 2 ) ; } } out . close ( ) ; }
(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 (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_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)))) (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 (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (binary_expression left: (parenthesized_expression (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal)))) right: (decimal_integer_literal)))) right: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (binary_expression left: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal))) right: (decimal_integer_literal)))))) consequence: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))))) alternative: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))))))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))