解题思路:
注意事项:
参考代码:
import java.util.Scanner; public class C1554 { public static void main(String[] args) { Scanner sc = new Scanner(System.in); while (sc.hasNext()) { F(sc.nextInt()); } sc.close(); } private static void F(int n){ long sum = 0; for(int k = 2; k <= n; k++){ if(isSu(k)) sum += k; } System.out.println(sum); } private static boolean isSu(int n){ for(int i = 2; i*i <= n; i++){ if(n%i == 0) return false; } return true; } }
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