UVA10494:If We Were a Child Again 大数除法加取余

import java.util.Arrays;import java.util.Scanner;import java.math.*;public class Main{    public static void main(String[] args)    {        Scanner cin = new Scanner(System.in);        BigInteger a,b;        String s;        while(cin.hasNext())        {            a=cin.nextBigInteger();            s=cin.next();            b=cin.nextBigInteger();            if(s.equals("/"))            {                System.out.println(a.divide(b));            }            else if(s.equals("%"))            {                System.out.println(a.mod(b));            }        }        cin.close();    }}

UVA748&&HDU1063： Exponentiation 大数的乘法，pow

import java.util.Arrays;import java.util.Scanner;import java.math.*;public class Main{    public static void main(String[] args)    {        Scanner cin = new Scanner(System.in);        BigDecimal a;        int n;        while(cin.hasNext())        {            a=cin.nextBigDecimal();            n=cin.nextInt();            BigDecimal cnt=a.pow(n).stripTrailingZeros();            System.out.println( cnt.toPlainString().replaceAll("^0", "") );         }        cin.close();    }}