A - Marks CodeForces - 152A 题意:给出一个学生人数n,每个学生的m个学科成绩(成绩从1到9)没有空格排列给出.在每科中都有成绩最好的人或者并列,求出最好成绩的人数 思路:求每列成绩中最大的数的个数.求出每列成绩中的最大值,遍历每列的各行若值与最大值一样就用另一个数组标记出来,最后遍历标记数组记录下总个数,即为最终结果. 代码: #include<bits/stdc++.h> using namespace std; int main() { int n,m; cin…

题目传送门 /* 贪心:首先要注意,y是中位数的要求:先把其他的都设置为1,那么最多有(n-1)/2个比y小的,cnt记录比y小的个数 num1是输出的1的个数,numy是除此之外的数都为y,此时的numy是最少需要的,这样才可能中位数大于等于y */ #include <cstdio> #include <iostream> #include <algorithm> #include <cstring> using namespace std; ; con…

http://codeforces.com/problemset/problem/540/B School Marks Time Limit:2000MS     Memory Limit:262144KB     64bit IO Format:%I64d & %I64u Submit Status Practice CodeForces 540B Description Little Vova studies programming in an elite school. Vova and…

B. School Marks Time Limit: 1 Sec  Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/540/problem/B Description Little Vova studies programming in an elite school. Vova and his classmates are supposed to write n progress tests, for each test the…

题目链接:http://codeforces.com/problemset/problem/540/B 题目意思:给出 k 个test的成绩,要凑剩下的 n-k个test的成绩,使得最终的n个test之和 <= x,且中位数 >= y.凑的时候   1 <= test的成绩 <= p 做得可辛苦了,泪~~~ 首先统计给出的 k 个test中有多少个是 >= y 的,然后从后往前补充,直到中位数是 k ,其余的数用 1 来填充. 无解结果需要考虑清楚.(1)n-k+sum_k…

Little Vova studies programming to p. Vova is very smart and he can write every test for any mark, but he doesn't want to stand out from the crowd too much. If the sum of his marks for all tests exceeds value x, then his classmates notice how smart h…

B. School Marks time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Little Vova studies programming in an elite school. Vova and his classmates are supposed to writen progress tests, for each…

题意与分析(CodeForces 540B) 题意大概是这样的,有一个考试鬼才能够随心所欲的控制自己的考试分数,但是有两个限制,第一总分不能超过一个数,不然就会被班里学生群嘲:第二分数的中位数(科目数保证为奇数)不能低于某个数,不然他妈就不让他打游戏.已知\(n\)门中\(k\)门成绩,求符合条件的其他科目的成绩.注意,不能考0分. 乍一看就是一个简单的贪心问题.但是细节相对较多. 抓住主要方向.先统计有多少门考不过中位数的,如果大于一半直接-1:然后按照这样的决策就可以了:小于一半的考1分,大…

题目链接:https://vjudge.net/contest/226823#problem/B Little Vova studies programming in an elite school. Vova and his classmates are supposed to write n progress tests, for each test they will get a mark from 1 to p. Vova is very smart and he can write e…

[Link]:http://codeforces.com/contest/831/problem/C [Description] 有一个人参加一个比赛; 他一开始有一个初始分数x; 有k个评委要依次对这个人评分; 依照时间顺序依次给出这k个人的评分(可能为负数,负数的时候,表示分数会降低,而如果为正,则分数增加); 然后有一个人记得这k次评分中的n次评分过后这个人的评分; (即知道其中k个评委评完分之后,那个人的k个即时分数) (这k个分数各不相同); 问你x有多少种不同可能; [Solutio…

题目链接:http://codeforces.com/problemset/problem/831/C 题意:有一位参赛选手,我们不知道他初始或最后的成绩,但是知道k次评审所加(减)的分数,以及n个在这过程中的他的分数.问这名选手初始分有几种情况. 思路:一开始考虑先求出评审分的前缀和,对过程分减去前缀和就能得到的初始分数,求出所有的初始分数情况,用map记录每个初始分重复的次数,重复次数==n 的即为正确的初始分. 然而这么做是WA了的. 分析第一个样例: 4 1-5 5 0 2010 如果按…

其实是很水的一道bfs题,昨晚比赛的时候没看清题意,漏了一个条件. #include<cstdio> #include<cstring> #include<iostream> #include<cmath> #include<algorithm> #include<set> #include<map> #include<queue> #include<stack> #include<strin…

题意:先给定5个数,n,  k, p, x, y.分别表示 一共有 n 个成绩,并且已经给定了 k 个,每门成绩 大于0 小于等于p,成绩总和小于等于x, 但中位数大于等于y.让你找出另外的n-k个成绩. 析:利用贪心算法,首先是只能小于等于 p,也就是成绩越小越好, 然后中位数还得大于等于y,所以我们放的成绩只有两个,一个是1,另一个是y,那么是最优的, 所以每次只要判定这个就好,在判定的时候,要先排序,再找中位数,再就是每次放两个,如果n-k不是偶数,那么就放一个数,再进行. 代码如下: #…

题意:一共n个数,给出其中k个数,要求这n个数的中位数为y,这n个数的和不超过x,补全剩下的n-k个数 先统计给出的k个数里面比中位数小的数, 如果cnt<=n/2,说明中位数还没有出现,把这n/2-cnt个数都补上1,剩下的都补上y 如果cnt>n/2,说明中位数不存在 #include<iostream> #include<cstdio> #include<cstring> #include <cmath> #include<stack…

[链接] 我是链接,点我呀:) [题意] 已知k门成绩. 总共有n门成绩. 让你构造剩下的n-k门成绩,使得这n门成绩的中位数>=y,并且这n门成绩的和要小于等于x. n为奇数 [题解] 首先判断k门成绩的和是不是小于等于x. 然后x-sum就是剩下的n-k个数字最多能填的和. 可以这样. 既然中位数要大于等于y; 那么转化为让(n+1)/2个数字都大于等于p; 则在剩下的n-k个位置凑足(n+1)/2个p就够了. 凑够了就都用1填就好. [代码] #include <bits/stdc++.…

http://codeforces.com/contest/738/problem/A Polycarp has interviewed Oleg and has written the interview down without punctuation marks and spaces to save time. Thus, the interview is now a string s consisting of n lowercase English letters. There is…

Codeforces#262_1002 B. Little Dima and Equation time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Little Dima misbehaved during a math lesson a lot and the nasty teacher Mr. Pickles gave him…

题目链接:http://codeforces.com/contest/493 A. Vasya and Football Vasya has started watching football games. He has learned that for some fouls the players receive yellow cards, and for some fouls they receive red cards. A player who receives the second y…

Fighting for Triangles 题目连接: http://codeforces.com/gym/100015/attachments Description Andy and Ralph are playing a two-player game on a triangular board that looks like the following: 1 2 3 4 5 7 8 6 9 10 11 13 14 16 17 12 15 18 At each turn, a playe…

B. Long Jumps Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/480/problem/B Description Valery is a PE teacher at a school in Berland. Soon the students are going to take a test in long jumps, and Valery has lost his favorit…

D. Selection Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100114 Description When selecting files in an application dialog, Vasya noted that he can get the same selection in different ways. A simple mouse click selects a sing…

B. Complete the Word time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output ZS the Coder loves to read the dictionary. He thinks that a word is nice if there exists a substring (contiguous segmen…

Little Dima and Equation Time Limit:1000MS     Memory Limit:262144KB     64bit IO Format:%I64d & %I64u Submit Status Practice CodeForces 460B Description Little Dima misbehaved during a math lesson a lot and the nasty teacher Mr. Pickles gave him the…

http://codeforces.com/contest/794/problem/C Description Oleg the client and Igor the analyst are good friends. However, sometimes they argue over little things. Recently, they started a new company, but they are having trouble finding a name for the…

http://codeforces.com/contest/831 A. Unimodal Array time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Array of integers is unimodal, if: it is strictly increasing in the beginning; after that…

A. Combination Lock time limit per test:2 seconds memory limit per test:256 megabytes input:standard input output:standard output Scrooge McDuck keeps his most treasured savings in a home safe with a combination lock. Each time he wants to put there…

A. Straight «A» time limit per test:1 second memory limit per test:256 megabytes input:standard input output:standard output Noora is a student of one famous high school. It's her final year in school — she is going to study in university next year.…

Polycarp watched TV-show where k jury members one by one rated a participant by adding him a certain number of points (may be negative, i. e. points were subtracted). Initially the participant had some score, and each the marks were one by one added…

C. Vasya and Basketball 题目链接:http://codeforces.com/problemset/problem/493/C time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vasya follows a basketball game and marks the distances from whi…

A. Straight «A» 题面 Noora is a student of one famous high school. It's her final year in school - she is going to study in university next year. However, she has to get an «A» graduation certificate in order to apply to a prestigious one. In school, w…