import java.util.Scanner;
class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int S = sc.nextInt();
int h =  S / 3600;
int m =  (S - h * 3600)/60;
int s = S - h * 3600 - m * 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