public class Main {
public static void main(String[] args){
	
	int input = new java.util.Scanner ( System.in ). nextInt();
	int h = input / (60 * 60);
	int m = (input / 60) - (h * 60);
	int s = input - (m * 60) - (h * 60 * 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