import java.util.Scanner;
public class Main{
    public static void main(String[]args){

        Scanner sc = new Scanner(System.in);
	int a = sc.nextInt();
	if(a >= 0 && a < 86400){
	    int h = a / 3600;
	    int m = a % 3600 / 60;
	    int s = a % 60;
		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