import java.util.Scanner; public class Main{ public static void main(String []args){ Scanner sc = new Scanner(System.in); int num = sc.nextInt(); int quanity = num * 1024 * 1024 / 4; System.out.printf("%d",quanity); } }
1Mb = 1024 kb
1 kb = 1024 b
一个整型数字占4b,换算完单位后要除以4。