import java.io.*;

class Main {
    public static void main(String[] args) throws IOException{
	BufferedReader br =
	    new BufferedReader(new InputStreamReader(System.in));

	String str = br.readLine();
	int seconds = Integer.parseInt(str);
	int hours = 0;
	int minutes = 0;
	for (int i = 0; seconds >= (60*60); i++) {
	    hours++;
	    seconds -= (60*60);
	}
	for (int i = 0; seconds >= 60; i++) {
	    minutes++;
	    seconds -= 60;
	}
	System.out.println(hours+":"+minutes+":"+seconds);


    }
}
/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