Can anyone help me, which is more efficient while using in the for loop?
for(u = 2; u <= sqrt(n); u++)
for(u = 2; u*u <= n; u++)
Here are my both submission
Using first method — 119098252
Using second method — 119098208
While using the first method i got TLE but the same code using with the second method got Accepted..
I am assuming that method one is calculating
sqrt(n) again and again and other one is calculating
u*u again and again then why one is got accepted other one is not.
Please tell me the reason behind this?