import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner a=new Scanner(System.in);
		int b=a.nextInt();
		int c=b/3600;
		int d=(b%3600)/60;
		int e=(b-(c*3600)-(d*60));
		
		System.out.println(c+":"+d+":"+e);	
	}

}
/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