2018-02-25 http://codeforces.com/contest/940/problem/A A. Points on the line time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output We've got no test cases. A big olympiad is coming up. But the pr…

A. Points on the line time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output We've got no test cases. A big olympiad is coming up. But the problemsetters' number one priority should be adding anot…

Codeforces Round #466 (Div. 2) 题解 A.Points on the line 题目大意: 给你一个数列,定义数列的权值为最大值减去最小值,问最少删除几个数,使得数列的权值小于等于给定值d 题解: 排序,每次挑最大的和最小的,看看最小的能跟多少个数差\(>d\),看看最大的能跟多少个数差\(>d\),取个数大的那个删除.复杂度\(n^2 + n\log n\) 代码 #include <iostream> #include <cstdio>…

Codeforces Round #486 (Div. 3) D. Points and Powers of Two 题目连接: http://codeforces.com/group/T0ITBvoeEx/contest/988/problem/D Description There are n distinct points on a coordinate line, the coordinate of i-th point equals to xi. Choose a subset of…

Codeforces Round #466 (Div. 2) E. Cashback(dp + 贪心) 题意: 给一个长度为\(n\)的序列\(a_i\),给出一个整数\(c\) 定义序列中一段长度为k的区间的贡献为区间和减去前\(\lfloor \frac{k}{c} \rfloor\)小数的和 现在要给序列\(a_i\)做一个划分,使得贡献的总和最小. 思路: 容易想到最裸的dp的思路 \(dp[i] = min(dp[j] + cost(j,i)) , j < i\), \(cost(j,…

从这里开始 题目列表 小结 Problem A Points on the line Problem B Our Tanya is Crying Out Loud Problem C Phone Numbers Problem D Alena And The Heater Problem E Cashback Problem F Machine Learning 小结 这场比赛和同学一起打.本来应该是很开心的事情,结果留下好多遗憾. 第一个遗憾是没能在20分钟内消灭A.B题.然后分数就不是很可观…

所有的题目都可以在CodeForces上查看 中间看起来有很多场比赛我没有写了 其实是因为有题目没改完 因为我不想改,所以就没有写了(大部分题目还是改完了的) 我还是觉得如果是打了的比赛就一场一场写比较好 要不然以后就写有难度的.比较好的题目?? 这场比赛时间真心良心(只是没吃饭) 状态也很好,考场上把\(ABCDE\)切了 \(F\)是自己弃疗了... 不管啦不管啦,进入正题了 题解 A.Points on the line 翻译: 给定一个长度为\(n\)的数组 问最少删去几个数之后使得最大…

人生中第三次\(CF\)... 考试中切了\(A\)~\(E\) \(F\)题会做没时间写 题解 A:Points on the line 题意 给定一个数列,删最小的数,使最大差不大于一个定值 Sol 排序后选的一定是段连续的区间,枚举左右端点即可 手速慢了233 # include <bits/stdc++.h> # define RG register # define IL inline # define Fill(a, b) memset(a, b, sizeof(a)) using…

C. Points on Plane Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/576/problem/C Description On a plane are n points (xi, yi) with integer coordinates between 0 and 106. The distance between the two points with numbers a and…

A. Points and Segments (easy) Time Limit: 1 Sec  Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/430/problem/A Description Iahub isn't well prepared on geometry problems, but he heard that this year there will be a lot of geometry problems on…