import java.util.Scanner;

class Main {
    static final int hMin = 60;
    static final int hSec = 3600;
    public static void main(String[] args) throws Exception{
        Scanner input = new Scanner(System.in);
        int hs = input.nextInt();
        int ms = hs%hSec;
        int cs = ms%60;
        System.out.println(hs/hSec+":"+ms/hMin+":"+cs);
    }
}
/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