杭电ACM 2012

#include<stdio.h>
#include<math.h>

int main()
{
    int i, j, n, x, y, t;
    while(scanf("%d%d",&x,&y)!=EOF)
    {   
        if(x==0&&y==0)
        {
            continue;
        }
        j=0;
        for(i=x;i<=y;i++)
        {
            t=i*i+i+41;

                for(n=2;n<=sqrt(t);n++)
                {
                    if(t%n==0)
                    {
                        j+=1;
                        break;
                    }
                    else
                    {
                        j=j;
                    }
               
                }
           
           
            }
            if(j==0)
            {
                printf("OK\n");
               
            }
            else
            {
                printf("Sorry\n");
            }
       
   
    }


    return 0;
}