import java.util.Scanner;

class Main
{
    public static void main(String args[])
    {
        Scanner scan = new Scanner(System.in);
        
        int S = scan.nextInt();
        int h = S/3600;
        int m = (S-3600*h)/60;
        int s = S%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