import java.io.*;
class Main{
   public static void main(String[] args)throws java.io.IOException{
    BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
        
      String tmp = input.readLine();
      int S = Integer.parseInt(tmp);
  
      int h=0,m=0,s=0;
  
        
      s = S%60;
      m = (S/60)%60;
      h = S/3600;
  
      System.out.println(h+":"+m+":"+s);
    }
}
/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