题目大意:Codeforces 444C DZY Loves Colors 题目大意:两种操作,1是改动区间上l到r上面德值为x,2是询问l到r区间总的改动值. 解题思路:线段树模板题. #include <cstdio> #include <cstring> #include <cstdlib> #include <algorithm> using namespace std; const int maxn = 5*1e5; typedef long lo…

题目链接: http://codeforces.com/problemset/problem/444/C J. DZY Loves Colors time limit per test:2 secondsmemory limit per test:256 megabytes 问题描述 DZY loves colors, and he enjoys painting. On a colorful day, DZY gets a colorful ribbon, which consists of…

C. DZY Loves Colors time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output DZY loves colors, and he enjoys painting. On a colorful day, DZY gets a colorful ribbon, which consists of n units (they…

题目链接:http://codeforces.com/contest/444/problem/C 给定一个长度为n的序列,初始时ai=i,vali=0(1≤i≤n).有两种操作: 将区间[L,R]的值改为x,并且当一个数从y改成x时它的权值vali会增加|x−y|. 询问区间[L,R]的权值和. n≤10^5,1≤x≤10^6. 感觉这是一个比较好的考察线段树区间更新的性质. 当区间的a[i]一样时,区间更新即可,这是剪枝. 注意,lazy标记存的是增量. #include <bits/stdc…

题目大意: 1 l r x操作 讲 [l,r]上的节点涂成x颜色,而且每一个节点的值都加上 |y-x| y为涂之前的颜色 2 l r  操作,求出[l,r]上的和. 思路分析: 假设一个区间为同样的颜色.那么我们才干够合并操作. 所以我们之前找同样的区间就好. 可是问题是怎样合并操作. 那么我们定义一个val  表示这个区间每一个位置上应该加上的值. pushdown 的时候这个值是能够相加的. #include <cstdio> #include <iostream> #incl…

DZY loves colors, and he enjoys painting. On a colorful day, DZY gets a colorful ribbon, which consists of n units (they are numbered from 1 to n from left to right). The color of thei-th unit of the ribbon is i at first. It is colorful enough, but w…

DZY Loves Colors Time Limit: 2000ms Memory Limit: 262144KB This problem will be judged on CodeForces. Original ID: 445E64-bit integer IO format: %I64d      Java class name: (Any) DZY loves colors, and he enjoys painting. On a colorful day, DZY gets a…

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题意:BC 76 div1 1004 有中文题面 然后奉上官方题解: 这是一道良心的基础数据结构题. 我们二分a[k]的值,假设当前是mid,然后把大于mid的数字标为1,不大于mid的数字标为0.然后对所有操作做完以后检查一下a[k]位置上是0还是1. 因为只有两种值,所以操作还是不难做的.只要用一个线段树,支持区间求和.区间赋值即可. 这样要排序一个区间时只要查询一下里面有几个1和几个0,然后把前半段赋值为0,后半段赋值为1即可(降序的话就是反过来). 复杂度是O(mlog^2n). #in…

题目 Source http://codeforces.com/problemset/problem/444/C Description DZY loves colors, and he enjoys painting. On a colorful day, DZY gets a colorful ribbon, which consists of n units (they are numbered from 1 to n from left to right). The color of t…