public static void main ( String [ ] args ) throws IOException {
  Scanner read = new Scanner ( System . in ) ;
  int t = read . nextInt ( ) ;
  for ( int x = 1 ;
  x <= t ;
  x ++ ) {
    int a = read . nextInt ( ) ;
    int b = read . nextInt ( ) ;
    System . out . println ( Math . min ( ( a + b ) / 3 , Math . min ( a , b ) ) ) ;
  }
}

public static void main ( String [ ] args ) throws IOException { Scanner read = new Scanner ( System . in ) ; int t = read . nextInt ( ) ; for ( int x = 1 ; x <= t ; x ++ ) { int a = read . nextInt ( ) ; int b = read . nextInt ( ) ; System . out . println ( Math . min ( ( a + b ) / 3 , Math . min ( a , b ) ) ) ; } }
(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: (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)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal)) (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier))))))))))))