import java.util.Scanner;
public class Main{
    int S;
    int h=0;
    int m=0;
    int s=0;
    
    public void solve(){
        Scanner sc = new Scanner(System.in);
        S=sc.nextInt();
        h=S/3600;
        m=(S-h*3600)/60;
        s=S-(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