Manage ID Pool

Implement a class to manage an ID pool. The ID range is [1, MaxLong]. Implement two methods: acquire(): Returns the smallest available ID from the pool, marking it as occupied. release(id): Returns the ID back to the pool, making it available for allocation again. Note: All IDs are available initially. It should always return the lowest ID available in the pool. Once an ID is released, it becomes available again. Example Input: pool = IdManager() a = pool.acquire() # Assume returns 1 b = pool.acquire() # Assume returns 2 pool.release(a) a = pool.acquire() # Assume now returns 1 Constraints: The number of operations does not exceed 100,000. ID range is from 1 to MaxLong. Example Input 5 acquire acquire release 1 acquire release 2