Submission #1371487

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Source Code Expand

use std::io;
use std::collections::VecDeque;

fn main() {
    let mut input = Input::new();
    let n: usize = input.next();
    let mut a: i64 = input.next();
    let mut x: i64 = 1;
    let mut h: i64 = 0;
    for _ in 0..n - 1 {
        let t: i64 = input.next();
        if a < t {
            if h == -1 {
                h = 0;
                x += 1;
            } else {
                h = 1;
            }
        }
        if a > t {
            if h == 1 {
                h = 0;
                x += 1;
            } else {
                h = -1;
            }
        }
        a = t;
    }
    println!("{}", x);
}

struct Input {
    queue: VecDeque<String>,
}

impl Input {
    fn new() -> Input {
        Input { queue: VecDeque::new() }
    }

    fn next<T>(&mut self) -> T
        where T: std::str::FromStr,
              T::Err: std::fmt::Debug
    {
        if self.queue.is_empty() {
            let mut line = String::new();
            let _ = io::stdin().read_line(&mut line);
            for x in line.split_whitespace() {
                self.queue.push_back(String::from(x));
            }
        }
        return self.queue.pop_front().unwrap().parse::<T>().unwrap();
    }
}

Submission Info

Judge Result