I am given $N$, which is Bob's encryption key. I was able to successfully factor $N$ into $N=p*q$.
Alice encrypts a messages for bob and sends
$a = [1,1,1,0,0,0,1,0,1,1,0,...]$
$b = 1545164156...$
where $b<N$. Given this information, how can I decrypt what the message Alice sent to Bob? I am very confused with the process for Blum-Blum-Shub Cryptosystem so any explanation as to how it works would be much appreciated.