import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        
        long time = sc.nextLong();
        
        long sec = time % 60;
        
        long minuteAll = time / 60;
        long minute = minuteAll % 60;
        long hour = minuteAll / 60;
        
        System.out.println(hour + ":" + minute + ":" + sec);
    }
}
/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