import static java.lang.System.out;
import java.util.Scanner;


public class Main {
    public static void main(String...args) {

        int S = new Scanner(System.in).nextInt();
        int timer = (60 * 60);
        int h = S / timer;
        int m = S % timer / 60;
        int s = S % timer % 60;
        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