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Help needed on a number theory problem.
problem link: http://lightoj.com/volume_showproblem.php?problem=1098
PDF Link: lightoj.com/volume_showproblem.php?problem=1098&language=english&type=pdf
I think this problems solution is Summation of ((floor(N/i) — 1) * i) .But n is 10^9. It will definately get TLE if I precalculate or use loop.I think there exist something that I do not know yet.Please help me solve this problem. If I need to learn any theory/algorithm to solve this problem please mention it.
Thank you very much.
| Rev. | Язык | Кто | Когда | Δ | Комментарий | |
|---|---|---|---|---|---|---|
| en4 |
|
i_am_eating_wa_and_tle | 2017-11-01 14:48:40 | 100 | ||
| en3 |
|
i_am_eating_wa_and_tle | 2017-11-01 14:41:47 | 2 | Tiny change: 'I think [This](light' -> 'I think [this](light' | |
| en2 |
|
i_am_eating_wa_and_tle | 2017-10-31 23:28:44 | 14 | Tiny change: 'mation of floor(N/i) * i**_ .But n' -> 'mation of ((floor(N/i) - 1) * i)**_ .But n' | |
| en1 |
|
i_am_eating_wa_and_tle | 2017-10-30 23:01:15 | 451 | Initial revision (published) |
