import java.util.Scanner;

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