import java.io.*;

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		int intIn = new Integer(in.readLine());
		if(intIn < 0 || intIn > 86400) {
			return;
		}
		int h = intIn / 3600;
		int m = (intIn - h * 3600) / 60;
		int s = intIn - (h * 3600 + m * 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