DZY Loves Sequences time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY has a sequence a, consisting of n integers. We'
A. DZY Loves Hash time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY has a hash table with p buckets, numbered from
D. DZY Loves Modification time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output As we know, DZY loves playing games. One da
题目地址:http://codeforces.com/contest/447/problem/C C. DZY Loves Sequences time limit per test 1 second memory limit per test 256 megabytes input standard input output standard outpu
C. DZY Loves Sequences time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY has a sequence a, consisting of n integers.
A. DZY Loves Hash time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY has a hash table with p buckets, numbered from0 to
This way 题意: 对于不同的数没有办法直接区间加,那么要了解斐波那契数列的一个性质: 假设a[n]=a[n-1]+a[n-2] 那么a[n]=f[n-1]*a[2]+f[n-2]*a[1](f表示斐波那契数列) ∑ i − 1 n a [ i ] = a [ n + 2 ] − a [ 2 ] \sum\limits_{i-1}^{n}a[i]=a[n+2]-a[2] i−1∑na