Java位运算 左移1位相当于乘2
2的n次方计算
http://www.nowcoder.com/questionTerminal/35a1e8b18658411388bc1672439de1d9
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while (sc.hasNext()) {
System.out.println(1 << sc.nextInt());
}
}
}
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