HDU 2012 素数判定

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		@SuppressWarnings("resource")
		Scanner in = new Scanner(System.in);
		while(in.hasNext()) {
			int x = in.nextInt();
			int y = in.nextInt();
			if((x>=-39 && x<=50) && (y>=-39 && y<=50) && x<=y) {
				if(x==0 && y==0) {
					continue;
				}else {
					PrimNumberJudge(x,y);
				}
			}

		}

	}

	public static void PrimNumberJudge(int x, int y) {
		boolean flag = true;
		for(int i=x;i<=y;i++) {
			int sum = i*i + i + 41;
			int sum1 = sum/2 + 1;
			for (int j=2;j<sum1;j++) {
				if(sum % j==0) {
					flag = false;
					break;
				}
			}
		}
		if(flag==true) {
			System.out.println("OK");
		}else {
			System.out.println("Sorry");
		}
		
	}

}