import java.io.*;
 
class Main{
    public static void main (String[ ] args) throws Exception{
        BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
        String str = br.readLine();

        int a = Integer.parseInt(str);
        
        System.out.println((a/3600) + ":" + (a%3600/60) + ":" +(a%3600%60));
    }
}
/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