백준2581: 소수

문제

https://www.acmicpc.net/problem/2581

문제 풀이

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();

        int min = Integer.MAX_VALUE;
        int sum = 0;
        for (int i = n; i <= m; i++) {
            int cnt = 0;
            for (int j = 1; j <= i; j++) {
                if (i % j == 0) {
                    cnt++;
                }
            }
            if (cnt == 2) {
                sum += i;
                if (min > i) {
                    min = i;
                }

            }
        }
        if (sum == 0) {
            System.out.println(-1);
        } else {
            System.out.println(sum+"\n"+min);
        }
    }
}