public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = Integer . parseInt ( ( sc . next ( ) ) ) ;
  int [ ] [ ] box = new int [ n ] [ ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int w = Integer . parseInt ( ( sc . next ( ) ) ) ;
    int h = Integer . parseInt ( ( sc . next ( ) ) ) ;
    box [ i ] = new int [ ] {
      w , h };
    }
    Arrays . sort ( box , new myComparator ( ) ) ;
    int [ ] a = new int [ n ] ;
    for ( int i = 0 ;
    i < n ;
    i ++ ) a [ i ] = box [ i ] [ 1 ] ;
    int ans = LIS ( a ) ;
    System . out . println ( ans ) ;
  }
  
public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = Integer . parseInt ( ( sc . next ( ) ) ) ; int [ ] [ ] box = new int [ n ] [ ] ; for ( int i = 0 ; i < n ; i ++ ) { int w = Integer . parseInt ( ( sc . next ( ) ) ) ; int h = Integer . parseInt ( ( sc . next ( ) ) ) ; box [ i ] = new int [ ] { w , h } ; } Arrays . sort ( box , new myComparator ( ) ) ; int [ ] a = new int [ n ] ; for ( int i = 0 ; i < n ; i ++ ) a [ i ] = box [ i ] [ 1 ] ; int ans = LIS ( a ) ; System . out . println ( ans ) ; }
(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 (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))))))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier)) dimensions: (dimensions)))) (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 (parenthesized_expression (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 (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))))))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (array_creation_expression type: (integral_type) dimensions: (dimensions) value: (array_initializer (identifier) (identifier))))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (object_creation_expression type: (type_identifier) arguments: (argument_list))))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) 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: (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (array_access array: (identifier) index: (identifier)) index: (decimal_integer_literal))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list (identifier))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))