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);
}
}
}