import java.util.*;
class Main{
    public static void main(String[] args){
	new Main().run();
    }
    Scanner sc = new Scanner(System.in);

    void run(){
	int s = sc.nextInt();
	String ans="";
	int a=0;
	while(s>=3600){
	    s -= 3600;
	    a++;
	}
	ans += Integer.toString(a)+":";
	a = 0;
	while(s>=60){
	    s -= 60;
	    a++;
	}
	ans += Integer.toString(a)+":";
	ans += Integer.toString(s);
	System.out.println(ans);
    }
}
/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