import java.util.Scanner;
class Main{
	
    Scanner sc = new Scanner(System.in);
	int S;
	int h,m,s;
	void goo(){
		S = sc.nextInt();
		h=S/3600;
		m=S%3600/60;
		s=S%60;
		System.out.println(h+":"+m+":"+s);
	}
	public static void main(String[]agrs){
		new Main().goo();
	}
}
	
/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