HDU-2012(素數判定)

素數判定

Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)

Total Submission(s): 148087 Accepted Submission(s): 52329

Problem Description

對于表達式n^2+n+41，當n在（x,y）範圍内取整數值時（包括x,y）(-39<=x

#include<stdio.h>
#include<math.h>
int main (){
    int x,y,i,j,k,h,flag;
    while(scanf("%d%d",&x,&y)!=EOF){
        if(x==&&y==)break;
        for(flag=,h=,i=x;flag==&&i<=y;i++){
            k=i*(i+)+;
            for(j=;j<=sqrt(k);j++){
                if(k%j==){
                    flag=;
                    break;
                }
            }
            if(flag==){
                h=;
                printf("Sorry\n");
                break;
            }
        }
        if(h==)printf("OK\n");
    }
    return ;
}