import java.util.Scanner;

public class Main{
    public static void main(String[] args) throws java.io.IOException{
        Scanner sc = new Scanner(System.in);
        int time = sc.nextInt();
        int hour = time / 3600;
        int minitue = (time%3600)/60;
        int second = time%60;
        System.out.println(hour+":"+minitue+":"+second);
    }
}
/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