import java.util.Scanner;
import static java.lang.System.out;

class Watch {
    public void run() {
        int input = new Scanner( System.in ).nextInt();
        int h = input / 3600;
        int m = input % 3600 / 60;
        int s = input % 60 % 60;

        out.printf( "%d:%d:%d\n", h, m, s);
    }
}

public class Main {
    public static void main( String... args) {
        Watch test = new Watch();
        test.run();
    }
}
/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