SGU 112 a^b-b^a

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JAVA大數....

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);}}}