import java.util.Scanner;
class Main{
public static void main(String[] agrs){
Scanner scan=new Scanner(System.in);
String str=scan.next();
int times=Integer.parseInt(str);
int a=times/3600;
times=times%3600;
int b=times/60;
times=times%60;
int c=times;
System.out.println(a+":"+b+":"+c);
}
}
/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