import java.io.*;
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 h = s /3600;
	s %= 3600;
	int m = s / 60;
	s %= 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