/**
 * This library provides two services: direct access to the computer's main
 * memory (RAM), and allocation and recycling of memory blocks. The Hack RAM
 * consists of 3840 words, each holding a 16-bit binary number.
 */ 
class Memory {
    
    /** Initializes the class. start is the first memory address of the heap.
     *  end is the last memory address of the heap */
    function void init(int start, int end) {
    }

    /** Returns the RAM value at the given address. */
    function int peek(int address) {
    }

    /** Sets the RAM value at the given address to the given value. */
    function void poke(int address, int value) {
    }

    /** Finds an available RAM block of the given size and returns
     *  a reference to its base address. */
    function int alloc(int size) {
    }

    /** De-allocates the given object (cast as an array) by making
     *  it available for future allocations. */
    function void deAlloc(Array o) {
    }    
}
