JAVA大数....

a^b-b^a Time Limit: 250MS   Memory Limit: 4096KB   64bit IO Format: %I64d & %I64u [Submit]   [Go Back]   [Status]   Description You are given natural numbers a and b. Find ab-ba. Input Input contains numbers a and b (1≤a,b≤100). Output Write answer to output. Sample Input 2 3 Sample Output -1 Source [Submit]   [Go Back]   [Status]

import java.util.*;
import java.math.*;

public class Solution
{
	public static void main(String[] args)
	{
		Scanner cin=new Scanner(System.in);
		BigInteger a,b;
		int A,B;
		while(cin.hasNextInt())
		{
			A=cin.nextInt();
			B=cin.nextInt();
			a=BigInteger.valueOf(A);
			b=BigInteger.valueOf(B);
			
			BigInteger c=BigInteger.ZERO;
			c=a.pow(B).subtract(b.pow(A));

			System.out.println(c);
		}
	}
}