import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        final int SEC_FOR_HOUR = 3600;
        final int SEC_FOR_MINUTE = 60;

        Scanner sc = new Scanner(System.in);
        int inputSec = 0;
        try {
            inputSec = sc.nextInt();
        } catch (Exception e) {
            // TODO: handle exception
        } finally {
            sc.close();
        }

        // Hour
        int hour = inputSec / SEC_FOR_HOUR;
        int wkSec = inputSec - hour * SEC_FOR_HOUR;
        // Minutes
        int minute = wkSec / SEC_FOR_MINUTE;
        wkSec = wkSec - minute * SEC_FOR_MINUTE;
        // Second
        int second = wkSec;

        StringBuffer sb = new StringBuffer();
        sb.append(hour + ":" + minute + ":" + second);

        System.out.println(sb);
    }
}
/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