解法一：进制转换

import java.io.*;
import java.util.Arrays;
class Main {
    public static void main(String[] args) throws IOException {
        StreamTokenizer in = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
        StringBuilder s = new StringBuilder("#");
        for (int i = 0; i < 3; ++i) {
            in.nextToken();
            int x = (int) in.nval;
            s.append(convert(x));
        }
        out.println(s.toString());
        out.flush();
    }
    private static char[] convert(int n) {
        int radix = 13;
        char[] ans = new char[2];
        Arrays.fill(ans, '0');
        int index = 1;
        int tmp;
        while (n > 0) {
            tmp = n % radix;
            ans[index--] = (char) (tmp < 10 ? tmp + '0' : tmp - 10 + 'A');
            n /= radix;
        }
        return ans;
    }
}