public static void main ( String [ ] args ) {
  int n = sc . nextInt ( ) ;
  ArrayList < pair > a = new ArrayList < pair > ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int az = sc . nextInt ( ) , bz = sc . nextInt ( ) ;
    pair p = new pair ( az , bz ) ;
    a . add ( p ) ;
  };
}

public static void main ( String [ ] args ) { int n = sc . nextInt ( ) ; ArrayList < pair > a = new ArrayList < pair > ( ) ; for ( int i = 0 ; i < n ; i ++ ) { int az = sc . nextInt ( ) , bz = sc . nextInt ( ) ; pair p = new pair ( az , bz ) ; a . add ( p ) ; } ; }
(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: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments (type_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)))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (identifier) (identifier))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))))))