我没有开挂
import java.util.;
import java.math.;
class Main{
public static void main(String[] args) {
Scanner in =new Scanner(System.in);
BigInteger a=in.nextBigInteger();
BigInteger b=in.nextBigInteger();
BigInteger m=in.nextBigInteger();
System.out.println(a.modPow(b, m));
}
}