Meeting rooms

#[test]
fn test_adjacent() {
    let start = std::time::Instant::now();
    let val = Solution::can_attend_meetings(vec![vec![1, 5], vec![5, 10]]);
    let expected = true;
    log_result!(val == expected, "test_adjacent", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_empty() {
    let start = std::time::Instant::now();
    let val = Solution::can_attend_meetings((vec![] as Vec<Vec<i32>>));
    let expected = true;
    log_result!(val == expected, "test_empty", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_example1() {
    let start = std::time::Instant::now();
    let val = Solution::can_attend_meetings(vec![vec![0, 30], vec![5, 10], vec![15, 20]]);
    let expected = false;
    log_result!(val == expected, "test_example1", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_example2() {
    let start = std::time::Instant::now();
    let val = Solution::can_attend_meetings(vec![vec![7, 10], vec![2, 4]]);
    let expected = true;
    log_result!(val == expected, "test_example2", start, &expected, &val);
    assert_eq!(val, expected);
}

#[test]
fn test_single() {
    let start = std::time::Instant::now();
    let val = Solution::can_attend_meetings(vec![vec![1, 5]]);
    let expected = true;
    log_result!(val == expected, "test_single", start, &expected, &val);
    assert_eq!(val, expected);
}