def getMinMemory(memoryRequirement, memoryAvailable):
    """
    Determines the smallest memory capacity required for a new server.
 
    Args:
        memoryRequirement: A list of integers for the memory requirements of the programs.
        memoryAvailable: A list of integers for the memory capacities of the existing servers.
 
    Returns:
        The minimum memory size required for the new server, or -1 if impossible.
    """
    n = len(memoryRequirement)
 
    # Step 1: Sort both lists
    prog_req_sorted = sorted(memoryRequirement)
    serv_avail_sorted = sorted(memoryAvailable)
 
    # Step 2: Iterate through each program as a candidate for the new server
    for i in range(n):
        candidate_program = prog_req_sorted[i]
 
        # Create a temporary list of remaining programs
        remaining_programs = prog_req_sorted[:i] + prog_req_sorted[i+1:]
 
        # Step 3: Check if the remaining programs can be assigned
        is_possible = True
        for j in range(n - 1):
            if remaining_programs[j] > serv_avail_sorted[j]:
                is_possible = False
                break
 
        # Step 4: If possible, we've found our minimum answer
        if is_possible:
            return candidate_program
 
    # Step 5: If the loop completes, no solution was found
    return -1
 
# Example usage from the problem
memoryRequirement = [2, 2, 7,3,5]
memoryAvailable = [3, 2, 7,2]
result = getMinMemory(memoryRequirement, memoryAvailable)
print(f"The minimum memory required for the new server is: {result}")
# Expected output: The minimum memory required for the new server is: 3

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