import java.io.*;

class Main{
	public static void main(String[] args) throws IOException{
		int a = 60*60;
		int b = 60;
		int x,h,m,s;

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str = br.readLine();
		x = Integer.parseInt(str);
		h = x/a;
		m = (x%a)/b;
		s = (x%a)%b;
		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