import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class Main {


    public static void main(String[] args) throws IOException {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = br.readLine();
        int n = Integer.parseInt(str);
        if( 0 <= n && n <= 86400 ){
            int a = n / 3600;
            int b = (n % 3600) / 60;
            int c = (n % 3600) % 60;
            System.out.println(a + ":" + b + ":" + c);
        }
    }
}
/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