static boolean isValidSeq ( int [ ] a , int n ) {
  int nodes = n + 2 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( a [ i ] < 1 || a [ i ] > nodes ) return false ;
  }
  return true ;
}

static boolean isValidSeq ( int [ ] a , int n ) { int nodes = n + 2 ; for ( int i = 0 ; i < n ; i ++ ) { if ( a [ i ] < 1 || a [ i ] > nodes ) return false ; } return true ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (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 (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal)) right: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier)))) consequence: (return_statement (false))))) (return_statement (true))))