import java.util.Scanner;

public class Main{
	public static void main(String[] args){

		GetNum test = new GetNum();
		test.ChangeSec();
			
	}
}

class GetNum{
	public void ChangeSec(){
		
			String sec = new Scanner(System.in).nextLine()	;
			int num = Integer.parseInt(sec);
			int test = num / 60;

			int h = test / 60;
			int m = test % 60;
			int s = num % 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