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