remind
[ABC090D] Remainder Reminder
原题链接: 洛谷 $\ $ AtCoder 如果你觉得 \(O(n)\) 没有跑到极限的话,你可以试试整除分块。 先来化一下式子: \[\sum\limits_{i=1}^n\sum\limits_{j=1}^n\;[i\bmod j\ge k] \]\[\sum\limits_{i=1}^n\su ......
Clouds remind me that magical things in life can come out of nowhere
Clouds can also transport me away from the duller parts of life, away from boring situations and away from day to day stresses and worries. They get m ......