Soldiers are the names of military personnel serving in the national army, including combatants and non-combatants, similar to ancient warriors and knights. Its duties are to defend national security, defend and guard national borders, stabilize government power and society, and sometimes participate in non-combat work, including disaster relief.
Queue is a special linear table, which is unique in that it can only be deleted at the front of the table and inserted at the back of the table. Like stack, queue is a linear table with limited operations. The end of the insert operation is called the end of the queue, and the end of the delete operation is called the head of the queue.
Running is defined as land animals moving with their feet. It is defined as a step in sports, and both feet will not land at the same time. It can also be aerobic exercise or anaerobic exercise.