import java.util.Scanner;
public class Main{
	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);
		int time=sc.nextInt();

		int h=time/3600;
		int m=(time-h*3600)/60;
		int s=time%60;
		
		sc.close();
		
		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