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

public class Main {

	public static void main(String[] args) throws Exception{
        int S;
        int h, m, s;

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        S = Integer.parseInt(br.readLine());

        h = S / (60 * 60);
        S = S % (60 * 60);
        m = S / 60;
        s = S % 60;
        System.out.println(h + ":" + m + ":" + s);

    }

}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz