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 Java (OpenJDK 11.0.6) (judge verdict: Accepted)

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.util.Scanner; 
import java.util.StringTokenizer; 

public class Main 
{ 
	static class FastScanner 
	{ 
		BufferedReader br; 
		StringTokenizer st; 
		
		public FastScanner() 
		{ 
			br = new BufferedReader(new
					InputStreamReader(System.in)); 
		} 
		
		String next() 
		{ 
			while (st == null || !st.hasMoreElements()) 
			{ 
				try
				{ 
					st = new StringTokenizer(br.readLine()); 
				} 
				catch (IOException  e) 
				{ 
					e.printStackTrace(); 
				} 
			} 
			return st.nextToken(); 
		} 
		
		int nextInt() 
		{ 
			return Integer.parseInt(next()); 
		} 
		
		long nextLong() 
		{ 
			return Long.parseLong(next()); 
		} 
		
		double nextDouble() 
		{ 
			return Double.parseDouble(next()); 
		} 
		
		String nextLine() 
		{ 
			String str = ""; 
			try
			{ 
				str = br.readLine(); 
			} 
			catch (IOException e) 
			{ 
				e.printStackTrace(); 
			} 
			return str; 
		} 
	} 

	public static void main(String[] args) {
		FastScanner sc=new FastScanner();
		int D=sc.nextInt();
		int T=sc.nextInt();
		int S=sc.nextInt();
		if(D<1 || T<1 || S<1)
		{
			System.out.print("No");
		}
		if(D>10000 || T>10000 || S>10000)
			System.out.print("No");
		if((S*T)>=D)
			System.out.print("Yes");
		else
			System.out.print("No");
	}

}