随笔分类 -  差分数组

摘要:FJ's N (1 ≤ N ≤ 10,000) cows conveniently indexed 1..N are standing in a line. Each cow has a positive integer height (which is a bit ... 阅读全文
posted @ 2019-02-20 01:07 black_hole6 阅读(295) 评论(0) 推荐(0)
摘要:Grigory has nn magic stones, conveniently numbered from 11 to nn. The charge of the ii-th stone is equal to cici.Sometimes Grigory get... 阅读全文
posted @ 2019-02-08 11:43 black_hole6 阅读(253) 评论(0) 推荐(0)
摘要:N个气球排成一排,从左到右依次编号为1,2,3....N.每次给定2个整数a b(a #include#include#include#define maxn 50005using namespace std;int lazy[1000005],N;struct no... 阅读全文
posted @ 2018-12-15 11:22 black_hole6 阅读(203) 评论(0) 推荐(0)
摘要:链接:https://ac.nowcoder.com/acm/contest/297/C来源:牛客网 时间限制:C/C++ 1秒,其他语言2秒空间限制:C/C++ 262144K,其他语言524288K64bit IO Format: %lld题目描述小w有m条线段,... 阅读全文
posted @ 2018-12-15 10:58 black_hole6 阅读(124) 评论(0) 推荐(0)
摘要:链接:https://ac.nowcoder.com/acm/contest/297/C来源:牛客网 时间限制:C/C++ 1秒,其他语言2秒空间限制:C/C++ 262144K,其他语言524288K64bit IO Format: %lld题目描述小w有m条线段,... 阅读全文
posted @ 2018-12-15 10:58 black_hole6 阅读(166) 评论(0) 推荐(0)
摘要:一、差分数组的定义及用途1.定义:对于已知有n个元素的离线数列d,我们可以建立记录它每项与前一项差值的差分数组f:显然,f[1]=d[1]-0=d[1];对于整数i∈[2,n],我们让f[i]=d[i]-d[i-1]。2.简单性质:(1)计算数列各项的值:观察d[2]... 阅读全文
posted @ 2018-12-15 10:35 black_hole6 阅读(250) 评论(0) 推荐(0)
摘要:一、差分数组的定义及用途1.定义:对于已知有n个元素的离线数列d,我们可以建立记录它每项与前一项差值的差分数组f:显然,f[1]=d[1]-0=d[1];对于整数i∈[2,n],我们让f[i]=d[i]-d[i-1]。2.简单性质:(1)计算数列各项的值:观察d[2]... 阅读全文
posted @ 2018-12-15 10:35 black_hole6 阅读(212) 评论(0) 推荐(0)