import java.util.Scanner;
public class Main{
     
    public void solve(){
		Scanner sc = new Scanner(System.in);
		
        int h,m,s;
		int jikan = sc.nextInt();
		
			h = jikan / 3600;
			m = (jikan - h * 3600 ) / 60;
			s = ((jikan - h * 3600 ) - m *60);
			
			System.out.println(h+":"+m+":"+s);
		
    }

       public static void main(String[]args){
        Main obj = new Main();
        obj.solve();
     }
}
/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