import java.util.Scanner;

public class Main {
	public static void main(String args[]){
		Scanner in = new Scanner(System.in);
		int S = in.nextInt();
		int h = S / 3600;
		int m = (S / 60)%60;
		int s = S % 60;
		System.out.print(h +":"+ m + ":"+s);
		System.out.println("");
	}
}
/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