import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

class Main{
  public static void main(String[] args){
    try{
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      int x = Integer.parseInt(br.readLine());
      int h = x/3600;
      int m = (x%3600)/60;
      int s = ((x%3600)%60);
      System.out.println(h + ":" + m + ":" + s);
    } catch(IOException e){
      System.err.println(e.toString());
    }
  }
}

/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