import java.util.*;
public class Main {
	public static void main(String[] args) {
	Scanner scan = new Scanner(System.in);
	int a = scan.nextInt();
	int h = a / 3600;
	int m = (a % 3600)/60;
	int s = (a % 3600)%60;
	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