Problem:
Score : 200 points

Problem Statement

N friends of Takahashi has come to a theme park.

To ride the most popular roller coaster in the park, you must be at least K centimeters tall.

The i-th friend is h_i centimeters tall.

How many of the Takahashi's friends can ride the roller coaster?

Constraints

1 \le N \le 10^5

1 \le K \le 500

1 \le h_i \le 500

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N K
h_1 h_2 \ldots h_N

Output

Print the number of people among the Takahashi's friends who can ride the roller coaster.

Sample Input 1

4 150
150 140 100 200

Sample Output 1

2

Two of them can ride the roller coaster: the first and fourth friends.

Sample Input 2

1 500
499

Sample Output 2

0

Sample Input 3

5 1
100 200 300 400 500

Sample Output 3

5

Solution in Rust (1.15.1) (judge verdict: Accepted)

#![allow(dead_code)]
#![allow(unused_must_use)]

fn solve(src: &str) -> String {
    use std::fmt::Write;
    let mut buf = String::new();
    let mut sc = Scanner::from_str(&src);

    let n: usize = sc.read();
    let k: usize = sc.read();
    let h: Vec<usize> = sc.vec(n);

    let mut ans = 0;
    for &h in h.iter() {
        if h >= k {
            ans += 1;
        }
    }

    write!(&mut buf, "{}", ans);

    buf
}

#[test]
fn test() {
    assert_eq!(solve(r"4 150
150 140 100 200"),r"2");
assert_eq!(solve(r"1 500
499"),r"0");
assert_eq!(solve(r"5 1
100 200 300 400 500"),r"5");
}

fn main() {
    let mut buf = String::new();
    use std::io::Read;
    std::io::stdin().read_to_string(&mut buf);
    use std::io::Write;
    std::io::stdout().write_all(solve(&buf).as_bytes());
}

struct Scanner<I>{
    src: I
}

impl<'a> Scanner<std::str::SplitWhitespace<'a>> {
    fn from_str(src: &'a str) -> Self {
        Scanner { src: src.split_whitespace() }
    }
}

impl<'a, I> Scanner<I> where I: std::iter::Iterator<Item = &'a str>{
    fn read<T: std::str::FromStr>(&mut self) -> T {
        self.src.next().unwrap().parse().ok().expect("Parse error")
    }
    fn vec<T: std::str::FromStr>(&mut self, n: usize) -> Vec<T> {
        (0..n).map(|_| self.read()).collect()
    }
    fn chars(&mut self) -> Vec<char> {
        self.src.next().unwrap().chars().collect()
    }
}