import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args){
    	try {
    		InputStreamReader isr = new InputStreamReader(System.in);
    		BufferedReader br = new BufferedReader(isr);
    		String buf = br.readLine();
    		int S = Integer.parseInt(buf);
    		if(0 <= S && S < 86400){
    		
    		int h=S/3600;
    		
    		int m=(S%3600)/60;
    		
    		int s=(S%3600)%60;
    		
    		System.out.println(h+":"+m+":"+s);
    		}
    	} catch(IOException e) {
		    System.err.println(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