public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int V = sc . nextInt ( ) ;
  adj = new LinkedList [ V ] ;
  for ( int i = 0 ;
  i < V ;
  i ++ ) {
    adj [ i ] = new LinkedList < > ( ) ;
  }
  for ( int i = 0 ;
  i < V - 1 ;
  i ++ ) {
    int u = sc . nextInt ( ) ;
    int v = sc . nextInt ( ) ;
    u -- ;
    v -- ;
    addEdge ( u , v ) ;
  }
  System . out . println ( VertexColoring ( V ) ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int V = sc . nextInt ( ) ; adj = new LinkedList [ V ] ; for ( int i = 0 ; i < V ; i ++ ) { adj [ i ] = new LinkedList < > ( ) ; } for ( int i = 0 ; i < V - 1 ; i ++ ) { int u = sc . nextInt ( ) ; int v = sc . nextInt ( ) ; u -- ; v -- ; addEdge ( u , v ) ; } System . out . println ( VertexColoring ( V ) ) ; }
(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)))) (expression_statement (assignment_expression left: (identifier) right: (array_creation_expression type: (type_identifier) dimensions: (dimensions_expr (identifier))))) (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 (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (object_creation_expression type: (generic_type (type_identifier) (type_arguments)) 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: (binary_expression left: (identifier) right: (decimal_integer_literal))) 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)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (update_expression (identifier))) (expression_statement (update_expression (identifier))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier)))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (method_invocation name: (identifier) arguments: (argument_list (identifier))))))))