UVA - 11666 - Logarithms

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) throws IOException {

        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);
        String m = "";
        StringBuffer sb = new StringBuffer("");
        while (true) {
            int n = Integer.parseInt(br.readLine());
            if (n == 0) {
                break;
            }
            boolean neg = false;
            double lol = Math.log(n);
            int c = (int) Math.floor(lol);
            lol = 1.0 - n / Math.pow(Math.E, 1.0 * c);
            if (Math.abs(lol) > 1) {
                c++;
                lol = 1.0 - n / Math.pow(Math.E, 1.0 * c);
            }
            if (lol < 0) {
                neg = true;
            }
            String g = (int) (Math.round(Math.abs(lol) * 1000 * 1000 * 100)) + "";
            sb.append(c).append(" ");
            if (neg) {
                sb.append("-");
            }
            sb.append("0.");
            for (int i = g.length(); i < 8; i++) {
                sb.append('0');
            }
            sb.append(g).append("\n");
        }
        System.out.print(sb);
    }
}