def alpha_walk_index(r, c, m):
    if m == 0:
        return 1
    size = 1 << (m - 1)  # 2^(m-1)
    if r < size and c >= size:
        offset = 0
        nr, nc = r, c - size
    elif r >= size and c < size:
        offset = 1
        nr, nc = r - size, c
    elif r < size and c < size:
        offset = 2
        nr, nc = r, c
    else:
        offset = 3
        nr, nc = r - size, c - size
    sub_square_size = 1 << (2 * m - 2)
    return offset * sub_square_size + alpha_walk_index(nr, nc, m - 1)

r = 13371337
c = 73317331
m = 60

print(alpha_walk_index(r, c, m))