import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Main {
	public static void main(String[] args) throws IOException{
		BufferedReader br =new BufferedReader(new InputStreamReader(System.in));
		int a ,b,c;
		String str = br.readLine();
		String strARY[] = str.split(" ");
		a= Integer.parseInt(strARY[0]);
		b = (a-a/3600*3600);
		c = (b-b/60*60);
		System.out.println(a/3600+":"+b/60+":"+ 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