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1083.txt
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1083.txt
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import java.math.BigInteger;
import java.util.Scanner;
public class Main {
static BigInteger m = new BigInteger("10000");
static BigInteger ret=BigInteger.valueOf(1);
static BigInteger r=BigInteger.valueOf(2);
public static BigInteger rec(BigInteger a,BigInteger b)
{
a=a.remainder(m);
if(b.compareTo(BigInteger.valueOf(0))==0)
return BigInteger.valueOf(1);
else
if((b.remainder(r)).compareTo(BigInteger.valueOf(0))==0)
{
ret = rec(a, b.divide(BigInteger.valueOf(2)));
ret=ret.multiply(ret);
}
else
{
ret = rec(a, (b.subtract(BigInteger.valueOf(1))).divide(r));
ret=a.multiply(ret.multiply(ret));
}
return ret.remainder(m);
}
public static void main(String[] args) {
Scanner in=new Scanner(System.in);
while(in.hasNext()){
BigInteger a=in.nextBigInteger();
BigInteger n=in.nextBigInteger();
BigInteger iki = new BigInteger("2");
BigInteger temp = rec(iki,n.subtract(BigInteger.ONE));
ret=rec(a,temp);
System.out.println(ret);
}
}
}