import java.util.Scanner; // ?????¨?????????????????????

public class Main {
    public static void main(String[] args) {
        // ?????????????????\?????????????????¨?????? sc ??????????????? (???????????????????????????????????????????????°???????????????).
        Scanner sc = new Scanner(System.in);

        // ????????? sc ??? int ?????¨??????????????????.
        int S = sc.nextInt();

        // ??????????¨??????????.
        int h = 0;
        int m = 0;
        int s = 0;
        h = S / (60 * 60);
        S =  S % (60 * 60);
        m = S / 60;
        S =  S % 60;
        s = S;
        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