@anonymous_b0y vector < bool > <-> bitset in C++ in terms of memory, vector < bool > v(N) use N / 8 bytes. Refer @mgch previous comments
Each solution link has been broken… 
I’m getting wrong answer in this code. I’m trying hashing with linked list. Would anybody please give a look?
Got AC … 
"We know they lie between 0 and 2^32−1, i.e., they can be represented by 31 bits."
how its 31 bits…i think it can be a 32 bits integer,because after mod we can get max value of 2^32-1,which is a 32 bits integer.
pliz help @mgch