import java.util.Scanner;

class Main
{
    public static void main(String[] args)
    {     
        Scanner scan = new Scanner(System.in);
        int a = scan.nextInt();
        int b = 3600;
        int c = 60;
        
        System.out.print( a / b );
        System.out.print( ":" );
        System.out.print( ( a % b ) / c );
        System.out.print( ":" );
        System.out.println( ( a % b ) % c );
        return;
}
}

/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