import java.util.Scanner;

public class Main{
	
	int h,m,s,S;
	
	public void input(){
		Scanner sc = new Scanner(System.in);
		S = sc.nextInt();
	}
	
	public void hour(){
		if(S >=0 && S < 86400){
			h = S/3600;
		}
		else{
			System.out.print("error");
		}
	}
	
	public void minute(){
		if(S >=0 && S < 86400){
			m = (S-h*3600)/60;
		}
		else{
			System.out.print("error");
		}
	}
	
	public void second(){
		if(S >=0 && S < 86400){
			s = S-h*3600-m*60;
		}
		else{
			System.out.print("error");
		}
		System.out.println(h+":"+m+":"+s);
	}
	
	public static void main(String[] args){
		Main obj = new Main();
		obj.input();
		obj.hour();
		obj.minute();
		obj.second();
	}
}
/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