import java.util.Scanner;

public class Main{


    public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
    	int Time = sc.nextInt();
    	int h = Time / 60 / 60;
    	int m = Time / 60 - h * 60;
    	int s = Time - m * 60 - h * 60 * 60;
        System.out.println(h + ":" + m + ":" + s);
        sc.close();
    }

}
/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