
    Given a list of passenger IDs from a ride-sharing platform, determine the number of potential rider pairs whose route compatibility can be shared based on their XOR compatibility score. Two riders are considered to have compatible routes when the XOR of their passenger IDs results in an even number, making them candidates for a shared ride to reduce urban congestion.
    

    
def find_even_pair(A):
    """
    Given a list of passenger IDs from a ride-sharing platform, determine the number of potential rider pairs whose route compatibility can be shared based on their XOR compatibility score. Two riders are considered to have compatible routes when the XOR of their passenger IDs results in an even number, making them candidates for a shared ride to reduce urban congestion.
    

    """
def find_even_pair(A):
    """
    Given a list of passenger IDs from a ride-sharing platform, determine the number of potential rider pairs whose route compatibility can be shared based on their XOR compatibility score. Two riders are considered to have compatible routes when the XOR of their passenger IDs results in an even number, making them candidates for a shared ride to reduce urban congestion.
    

    """
    count = 0
    for i in range(0, len(A)):
        for j in range(i + 1, len(A)):
            if (A[i] ^ A[j]) % 2 == 0:
                count += 1
    return count