SGU 112 a^b-b^a (高精度)

主类名必须为Solution，SGU的FAQ里面有写

import java.io.*;
import java.math.BigInteger;
import java.util.*;
public class Solution{
	public static void main(String[] args){
		Scanner in = new Scanner(System.in);
		int a = in.nextInt();
		int b = in.nextInt();
		BigInteger A = BigInteger.valueOf(a);	
		A = A.pow(b);
		BigInteger B = BigInteger.valueOf(b);
		B = B.pow(a);
		System.out.println(A.subtract(B));
	}
}