zufe oj Problem H: 简单数学题 java

a的b次和c的d次比较大小

import java.math.BigInteger;import java.util.Scanner;public class Main {    public static void main(String[] args) {        // TODO Auto-generated method stub        Scanner in=new Scanner(System.in);        int i=0,n=0,m=0,cas=0;        int b,d;        BigInteger a,c;        while(in.hasNext())        {            a=in.nextBigInteger();            b=in.nextInt();            c=in.nextBigInteger();            d=in.nextInt();            a=a.pow(b);            c=c.pow(d);            int f=a.compareTo(c);            if(f==-1)            System.out.println('<');            else if(f==1)                 System.out.println('>');            else if(f==0)                System.out.println('=');        }        in.close();    }}