import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner kbScanner = new Scanner(System.in);
		
		int sec = kbScanner.nextInt();
		
		int hour = 0, minute = 0, second = 0;
		
		hour = sec / 3600;
		sec -= hour * 3600;
		minute = sec / 60;
		sec -= minute * 60;
		second = sec;
		
		System.out.println(hour + ":" + minute + ":" + 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