rust_test/src/main.rs

use std::cmp::max;

struct Solution;
impl Solution {
    pub fn count_days(mut days: i32, mut meetings: Vec<Vec<i32>>) -> i32 {
        meetings.sort_by(|a, b| a[0].cmp(&b[0]));
        let mut ans = 0;
        let mut last_end = 1;
        for c in meetings.iter() {
            if last_end >= c[0] {
                last_end = max(last_end, c[1] + 1);
                continue;
            }
            ans += c[0] - last_end;
            last_end = c[1] + 1;
        }
        days += 1;
        if days > last_end {
            ans += days - last_end;
        }
        ans
    }
}

fn main() {
    let sl = Solution::count_days(10, vec![vec![5, 7], vec![1, 3], vec![9, 10]]);
    println!("{}", sl);
}