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