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)]
#![allow(unused_macros)]
#![allow(unused_imports)]

extern crate proconio;
use proconio::marker::Usize1;
use proconio::{fastout, input};
use std::vec::*;

macro_rules! echo {
  {$x:expr} => {println!("{}", $x)}
}

macro_rules! chmax {
  {$x:expr, $y:expr} => {
    $x = std::cmp::max($x, $y)
  }
}

macro_rules! chmin {
  {$x:expr, $y:expr} => {
    $x = std::cmp::min($x, $y)
  }
}

#[allow(unused_variables)]
#[fastout]
fn main() {
  let d: usize;
  let t: usize;
  let s: usize;
  input! {
    d: usize,
    t: usize,
    s: usize,
  }
  echo!(if d <= t * s { "Yes" } else { "No" });
}