Not able to understand problem

#1

please give some hint or algorithm

#2

hello @Shubh-Garg-2556190207986238
the question is simple you are given two integers a and b you have count set bits for each number between a and b and output their sum.

simple approach will be to iterate from i -> a to b and then count number of set bit in each number and add it to ur sum
and then print the sum