Single number ii

#[test]
fn test_larger_numbers() {
    let start = std::time::Instant::now();
    let val = Solution::single_number_ii(vec![30000, 500, 100, 30000, 100, 30000, 100]);
    let expected = 500;
    log_result!(val == expected, "test_larger_numbers", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_negative_numbers() {
    let start = std::time::Instant::now();
    let val = Solution::single_number_ii(vec![-2, -2, 1, 1, 4, 1, 4, 4, -4, -2]);
    let expected = -4;
    log_result!(val == expected, "test_negative_numbers", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_single_number_3() {
    let start = std::time::Instant::now();
    let val = Solution::single_number_ii(vec![2, 2, 3, 2]);
    let expected = 3;
    log_result!(val == expected, "test_single_number_3", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_single_number_99() {
    let start = std::time::Instant::now();
    let val = Solution::single_number_ii(vec![0, 1, 0, 1, 0, 1, 99]);
    let expected = 99;
    log_result!(val == expected, "test_single_number_99", start, &expected, &val);
    assert_eq!(val, expected);
}