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package cn.edu.gxu;
import java.util.Scanner;
public class Calculator {
public static void main(String[] args)
{
Scanner sc=new Scanner(System.in);
double result=1.0;
String Command=sc.nextLine();
String parameters=sc.nextLine();
if(Command.equals("0"))
result=Calculator.Log(parameters);
// else if(Command.equals("1"))
// result=Calculator.ex(parameters);
// else if(Command.equals("2"))
// result=Calculator.jjcc(parameters);
// else
// result=Calculator.sin(parameters);
System.out.println(result);
}
public static double Log(String s)
{
String[] parameters=new String[2];
parameters=s.split(" ");//用空格切分传过来的两个数字
float a=Float.parseFloat(parameters[0]);
float b=Float.parseFloat(parameters[1]);
double result=Math.log(b)/Math.log(a); //log 都是用e为底还要用个换底公式OvO
return result;
}
public static double sin()
{
}
public static double jjcc()//加减乘除哈哈
{
}
public static double ex()//e的幂
{
}
}