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)

use std::io;

fn procon_read<T: std::str::FromStr>() ->  Vec<T> {
    let mut buf = String::new();
    io::stdin().read_line(&mut buf).expect("");
    let iter = buf.split_whitespace();
    let mut v: Vec<T> = Vec::new();
    for i in iter {
        v.push(i.parse().ok().unwrap());
    }
    v
}

fn main() {
    let mut v:Vec<u64> = procon_read();
    if v[0]/v[2] < v[1] {
        println!("Yes");
    }else if v[0]/v[2] == v[1] && v[0]%v[2] == 0 {
        println!("Yes");
    }else {
        println!("No");
    }
}