import java.util.*;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
	    
		int S = sc.nextInt();
		
		int h = S / 3600;
		S = S % 3600;
		
		int m = S / 60;
		S = S % 60;
		
		System.out.printf("%d:%d:%d\n", 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