assert_eq!(grains::square(input), expected);

	assert_eq!(grains::square(input), expected);

#[ignore]

    process_square_case(1, 1);

	process_square_case(1, 1);

    process_square_case(2, 2);

	process_square_case(2, 2);

    process_square_case(3, 4);

	process_square_case(3, 4);

    process_square_case(4, 8);

	process_square_case(4, 8);

    process_square_case(16, 32_768);

	process_square_case(16, 32_768);

    process_square_case(32, 2_147_483_648);

	process_square_case(32, 2_147_483_648);

    process_square_case(64, 9_223_372_036_854_775_808);

	process_square_case(64, 9_223_372_036_854_775_808);

    grains::square(0);

	grains::square(0);

    grains::square(65);

	grains::square(65);

    assert_eq!(grains::total(), 18_446_744_073_709_551_615);

	assert_eq!(grains::total(), 18_446_744_073_709_551_615);

    unimplemented!("grains of rice on square {}", s);

	if (1..=64).contains(&s) {
		2_u64.pow(s - 1)
	} else {
		panic!("Square must be between 1 and 64");
	}

    unimplemented!();

	(1_u32..=64).map(square).sum()