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

public class Main {
	public static void main(String[] args) throws NumberFormatException, IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		long hour,min,sec;
		sec = Long.parseLong(br.readLine());
		sec -= (hour = sec / 60 /60) * 60 * 60;
		sec -= (min = sec / 60) * 60;
		System.out.printf("%d:%d:%d%n", hour, min, sec);
	}
}
/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