Problem:
Score: 100 points

Problem Statement

Takahashi the Jumbo will practice golf.

His objective is to get a carry distance that is a multiple of K, while he can only make a carry distance of between A and B (inclusive).

If he can achieve the objective, print OK; if he cannot, print NG.

Constraints

All values in input are integers.

1 \leq A \leq B \leq 1000

1 \leq K \leq 1000

Input

Input is given from Standard Input in the following format:

K
A B

Output

If he can achieve the objective, print OK; if he cannot, print NG.

Sample Input 1

7
500 600

Sample Output 1

OK

Among the multiples of 7, for example, 567 lies between 500 and 600.

Sample Input 2

4
5 7

Sample Output 2

NG

No multiple of 4 lies between 5 and 7.

Sample Input 3

1
11 11

Sample Output 3

OK

Solution in Java (OpenJDK 11.0.6) (judge verdict: Wrong Answer)

import java.io.*;
import static java.lang.System.out;

public final class Main {
	public static void main(String[] args) throws IOException {
		try (var istr = new InputStreamReader(System.in);
			 var br = new BufferedReader(istr)) {
			long k = Long.parseLong(br.readLine());
			long i = 100;
			int years = 0;
			while (i <= k) {
				i += (i/100);
				years += 1;
			}
			out.printf("%d%n", years);
		}
	}
}