import java.lang.*;
import java.util.*;

public class Main {

    public static void main(String[] args) throws Exception {
        Scanner stdId = new Scanner(System.in);
        int s = stdId.nextInt();
        int hh = (int)s/3600;
        int mm = (int)s%3600/60;
        int ss = (int)s%3600%60;
        System.out.println(hh+":"+mm+":"+ss);
    }
}
/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