import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		int S;
		Scanner scanner=new Scanner(System.in);
		S=scanner.nextInt();
		
		
	    int s,m,h;
	    if(0<=S&S<86400){
	    s=S%60;
	    m=(S-s)%3600;
	    h=(S-m-s)/3600;
	    
	    
	    System.out.println(h+":"+m/60+":"+s);

	}

}
}

/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