Craving excitement beyond the tedious routine of eating, sleeping, and sipping coffee on weekends, we decided to embark on an exhilarating journey to Bach Ma - the perfect destination to beat the boredom.
As a laid-off employee, you prepare for a series of top companies, and then attempt to apply one by one (only apply the next if the current is rejected) until one hires you.
As an army commander, you have to plan all the tasks for the soldiers, so that they can execute them. This process is called command.
You need to store the leaves hierarchically, sometimes you will count the leaves. Tree will be a suitable structure to facilitate leaf counting.
Apply singleton to maintain a single phone line between the two sides indefinitely instead of repeatedly establishing and disconnecting multiple phone lines for efficiency.