import java.util.*;

class Main{
  public static void main(String args[]){
    Scanner inputs = new Scanner(System.in);
    int seconds = inputs.nextInt();
    int minutes = seconds / 60;
    seconds = seconds % 60;
    int hours = minutes / 60;
    minutes = minutes % 60;
    System.out.println(hours + ":" + minutes + ":" + seconds);
  }
}
/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