Coldfresh的博客

An abandoned country has n(n≤100000)n(n≤100000) villages which are numbered from 1 to nn. Since abandoned for a long time, the roads need to be re-built. There are m(m≤1000000)m(m≤1000000) roads to be

给出正整数n和k，计算j(n, k)=k mod 1 + k mod 2 + k mod 3 + … + k mod n的值 其中k mod i表示k除以i的余数。 例如j(5, 3)=3 mod 1 + 3 mod 2 + 3 mod 3 + 3 mod 4 + 3 mod 5=0+1+0+3+3=7 Input 输入仅一行，包含两个整数n, k。 1<=n ,k<=10^...