import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while( sc.hasNext() ){
            String[] line = sc.nextLine().split(" ");
            int inputtime = Integer.parseInt(line[0]);
            int hour = inputtime/3600;
            int minute = inputtime%3600/60;
            int second = inputtime%3600%60;
            System.out.println(hour+":"+minute+":"+second);
        }
    }
}
/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