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 Kotlin (1.3.71) (judge verdict: Accepted)

fun main() {
    val (k, a, b) = next3Int()
    for (i in a..b) {
        if (i % k == 0) {
            return println("OK")
        }
    }
    println("NG")
}

val scanner = java.util.Scanner(System.`in`)
fun next(): String = scanner.next()
fun nextInt() = scanner.nextInt()
fun next2Int() = Pair(scanner.nextInt(), scanner.nextInt())
fun next3Int() = Triple(scanner.nextInt(), scanner.nextInt(), scanner.nextInt())
fun nextLong() = scanner.nextLong()
fun nextLine(): String = scanner.nextLine()
fun nextList() = nextLine().split(" ")
fun nextIntList() = nextList().map(String::toInt)
fun nextIntArray(size: Int) = IntArray(size) { nextInt() }
fun nextLongList() = nextList().map(String::toLong)
fun printYesNo(isYes: Boolean) = println(if (isYes) "Yes" else "No")