import java.io.IOException;
import java.util.Scanner;

//????????????????????????hms???????????????
public class Main{

	public static void main(String[] args) throws IOException{

		Scanner in = new Scanner(System.in);
		int x=in.nextInt();
		hms(x);
		in.close();

	}

	public static void hms(int num){
		int h=num/3600;
		int m=(num%3600)/60;
		int s=(num%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