import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
class Main
{
    public static void main(String[] args) throws IOException {
	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	int s = Integer.parseInt(br.readLine());
	int sec = s % 60;
	int t = s / 60;
	int min = t % 60;
	int hour = t / 60;

	System.out.println(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