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