import java.io.*;

class Main{
	public static void main(String[] args){
		int hour=0;
		int min=0;
		int sec=0;
		try{
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			String line = br.readLine();
			int lineNum = Integer.parseInt(line);
			hour = lineNum / 3600;
			min = (lineNum % 3600) / 60;
			sec = lineNum % 60;
			String watch = hour +":"+ min +":"+sec;
			System.out.println(watch);
		}
		catch(IOException e){
		}
	}
}
/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