HDU 1063 Exponentiation

JAVA 水过

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

public class aa
{
	public static void main( String[] args )
	{
		BigDecimal a,b;
		int c;
		Scanner cin = new Scanner(System.in);
		while( cin.hasNext() )
		{
			a = cin.nextBigDecimal();
			b = BigDecimal.valueOf(1);
			c = cin.nextInt();
			for( int i = 0; i < c; ++i )
					b = b.multiply(a);
			String str = b.stripTrailingZeros().toPlainString();
			if( str.charAt(0) == '0' )
				System.out.println( str.substring(1) );
			else
				System.out.println( str );
		}
		
	}
}