HDOJ 2012 素数判定

import java.util.Scanner;
class Main{
  public static void main(String args[]){
      Scanner sc = new Scanner(System.in);
      while(sc.hasNext()){
         int x = sc.nextInt();
         int y = sc.nextInt();
         if(x==0&&y==0)
         return ;
         int flag = 0;
         for(int i=x;i<=y;i++){
             if(!susu(i*i+i+41)){
                 System.out.println("Sorry");
                 flag=1;
                 break;
             }
         }
         if(flag==0)
         System.out.println("OK");
      }
  }
  public static boolean susu(int n ){
  //判断n是否是素数，是素数返回true
      for(int i=2;i*i<=n;i++){
          if(n%i==0)
          return false;
      }
      return true;
  }
}