import java.io.BufferedReader;
import java.io.InputStreamReader;
 
public class Main{
  public static void main(String[] args) throws Exception{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int second = Integer.parseInt(br.readLine());
		int h = second / (60 * 60);
                int m = second % (60 * 60) / 60;
                int s = second % (60 * 60) % 60;
                System.out.println(h + ":" + m + ":" + 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