
import java.util.*;

class Main {
		public static void main (String[]agrs){
			int s;
			int m;
			int h;
			Scanner sc = new Scanner(System.in);
			 s =sc.nextInt();
			 m =s/60;
			 h=m/60;
			 s=s%60;
			 m=m%60;
			 h=h%60;
			 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