import java.util.Scanner; public class Main{ public static void main(String []args){ Scanner sc = new Scanner(System.in); int weight = sc.nextInt(); if(weight % 2 == 0 && weight != 2){ System.out.printf("YES, you can divide the watermelon into two even parts."); }else{ System.out.printf("NO, you can't divide the watermelon into two even parts."); } } }这题要注意 weight != 2,因为为2时切开后各部分不是偶数,不符合题意。