import java.util.Scanner;

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