112. a^b-b^a
time limit per test: 0.25 sec.
memory limit per test: 4096 KB
You are given natural numbers a and b. Find a^b-b^a.
Input
Input contains numbers a and b (1≤a,b≤100).
Output
Write answer to output.
Sample Input
2 3
Sample Output
-1
import java.io.*;
import java.math.BigInteger;
import java.util.Scanner;
public class Main {
public static void main(String []args) throws IOException{
int a,b;
Scanner scanner=new Scanner(System.in);
a=scanner.nextInt();b=scanner.nextInt();
BigInteger A=BigInteger.valueOf(a);
BigInteger B=BigInteger.valueOf(b);
A=A.pow(b);B=B.pow(a);
A=A.subtract(B);
System.out.println(A);
}
}
快速切题 sgu 112. a^b-b^a 大数 次方 难度:0 非java:1
原文：http://www.cnblogs.com/xuesu/p/4106946.html