import static java.lang.System.out;
    public class Main {
        public static void main(String[] args){
            int time = new java.util.Scanner(System.in).nextInt();

            int hour = time / 3600;
            int minute = (time % 3600) / 60;
            int second = (time % 3600) % 60;
            out.print(hour + ":");
            out.print(minute + ":");
            out.println(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