using System;
//判斷是否是四的倍數
public class Program
{
public static void Main()
int num =16;
//用 log 解
//Console.WriteLine((Math.Log(64,4)));
if((int)Math.Log(num,4) == Math.Log(num,4)) Console.WriteLine("4的"+Math.Log(num,4)+"倍");
//--Log end
if(num<4 && num!=1){
num=num;
}
else
while(num>1)
if(num%4==0){
num = num/4;
else{
break;
Console.WriteLine(num==1 ? true : false);