题解 | #牛牛的素数和#
牛牛的素数和
http://www.nowcoder.com/practice/d748d79f68ab443482c5547d93824f50
import java.util.Scanner;
public class Main{
public static void main(String[] args){
Scanner scanner = new Scanner(System.in);
int first = scanner.nextInt();
int second = scanner.nextInt();
int sum = 0;
for(int index = first; index <= second; index++){
if(check(index)){
sum += index;
}
}
System.out.print(sum);
}
private static boolean check(int num){
if (num < 2) return false;
for (int index = 2; index <= num / index; index++ )
{
if (num % index == 0) {
return false;
}
}
return true;
}
}
