import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int time = sc.nextInt();
		if(time >= 0 && time <=86399) {
		int h = time/3600;//对time整除3600求得小时
		int m = (time - h*3600)/60;//用time减去h*3600再整除60得到分钟
		int s = (time - h*3600 - m*60);//得到秒数
		System.out.println(h+":"+m+":"+s);
		}
	}
	
}