import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args)throws IOException{
		BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
	String s;
	int x;
	s= buf.readLine();
	x= Integer.parseInt(s);
	int a = x/3600;
	int b = (x%3600)/60;
	int c = (x%3600)%60;
	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