题解 | #2的N次方#
2的N次方
https://www.nowcoder.com/practice/e9a4919b8848451d9aff81e3cdd133b1
import java.util.Scanner; import java.math.BigInteger; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); // 注意 hasNext 和 hasNextLine 的区别 int n = in.nextInt(); if(n>=512 &&n<=1024){ BigInteger result = BigInteger.valueOf(2).pow(n); System.out.println(result.toString()); }else{ System.out.println(0); } } }