Problem:
Score : 100 points

Problem Statement

Takahashi is meeting up with Aoki.

They have planned to meet at a place that is D meters away from Takahashi's house in T minutes from now.

Takahashi will leave his house now and go straight to the place at a speed of S meters per minute.

Will he arrive in time?

Constraints

1 \leq D \leq 10000

1 \leq T \leq 10000

1 \leq S \leq 10000

All values in input are integers.

Input

Input is given from Standard Input in the following format:

D T S

Output

If Takahashi will reach the place in time, print Yes; otherwise, print No.

Sample Input 1

1000 15 80

Sample Output 1

Yes

It takes 12.5 minutes to go 1000 meters to the place at a speed of 80 meters per minute. They have planned to meet in 15 minutes so he will arrive in time.

Sample Input 2

2000 20 100

Sample Output 2

Yes

It takes 20 minutes to go 2000 meters to the place at a speed of 100 meters per minute. They have planned to meet in 20 minutes so he will arrive just on time.

Sample Input 3

10000 1 1

Sample Output 3

No

He will be late.

Solution in Rust (1.42.0) (judge verdict: Accepted)

#![allow(non_snake_case, unused)]
use std::io::*;
use std::str::FromStr;
use std::collections::*;

fn main() {
    let cin = stdin();
    let cin = cin.lock();
    let mut sc = Scanner::new(cin);

    let d: i32 = sc.next();
    let t: i32 = sc.next();
    let s: i32 = sc.next();

    if s * t >= d {
	println!("Yes");
    } else {
	println!("No");
    }
}


// Scanner
struct Scanner<R: std::io::Read> {
    reader: R,
}

#[allow(dead_code)]
impl<R: Read> Scanner<R> {
    fn new(reader: R) -> Scanner<R> {
	Scanner { reader: reader }
    }

    fn read<T: FromStr> (&mut self) -> Option<T> {
	let token = self
	    .reader
	    .by_ref()
	    .bytes()
	    .map(|c| c.unwrap() as char)
	    .skip_while(|c| c.is_whitespace())
	    .take_while(|c| !c.is_whitespace())
	    .collect::<String>();
	if token.is_empty() {
	    None
	} else {
	    token.parse::<T>().ok()
	}
    }

    fn next<T: FromStr>(&mut self) -> T {
	if let Some(s) = self.read() {
	    s
	} else {
	    writeln!(stderr(), "Terminated with EOF").unwrap();
	    std::process::exit(0);
	}
    }

    fn vec<T: FromStr>(&mut self, n: usize) -> Vec<T> {
	(0..n).map(|_| self.next()).collect()
    }

    fn char(&mut self) -> char {
	self.next::<String>().chars().next().unwrap()
    }
}