import java.io.*;
class Main {
    public static void main(String[] args) throws IOException {
    	int tmp = 0;
        BufferedReader r =
            new BufferedReader(new InputStreamReader(System.in), 1);
        int S = Integer.parseInt(r.readLine());
        int s = S%60;
        tmp = S/60;
        int m = tmp%60;
        tmp = tmp/60;
        int h = tmp%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