I did not understood the logic can someone help

#1

Please explain me the concept of solving this problem i am unable to understand

#2

hi @numanshaikh25,
this will help you to calculate things related to prime no in an optimized way, even you can pre-calculate and thus will help you in reducing time complexity.

You can read more from https://cp-algorithms.com/algebra/sieve-of-eratosthenes.html

anything specifically you wanna know more?

#3

and what is LL in the for loop initialization

#4

@numanshaikh25, it is long long int

#5

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