题目链接:http://www.codeforces.com/problemset/problem/327/A题意:你现在有n张牌,这些派一面是0,另一面是1.编号从1到n,你需要翻转[i,j]区间的牌一次,使得看到的牌是1的数量最大.C++代码: #include <iostream> using namespace std; ; int n, a[maxn], sum[maxn]; int flip(int L, int R) { ]; - a1; //cout << &quo
D. Finals in arithmetic 题目连接: http://www.codeforces.com/contest/625/problem/D Description Vitya is studying in the third grade. During the last math lesson all the pupils wrote on arithmetic quiz. Vitya is a clever boy, so he managed to finish all th
[44]Wildcard Matching [45]Jump Game II (2018年11月28日,算法群衍生题) 题目背景和 55 一样的,问我能到达最后一个index的话,最少走几步. 题解: [55]Jump Game (2018年11月27日,算法群) 给了一个数组nums,nums[i] = k 代表站在第 i 个位置的情况下, 我最多能往前走 k 个单位.问我能不能到达最后一个 index. 题解:虽然是贪心分类,我还是用dp解了.dp[i] 代表我能不能到达第 i 个位置. c
Wooden Sticks Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 15564 Accepted Submission(s): 6405 Problem Description There is a pile of n wooden sticks. The length and weight of each stick a
FatMouse' Trade Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 56784 Accepted Submission(s): 19009 Problem Description FatMouse prepared M pounds of cat food, ready to trade with the cats g
http://codeforces.com/contest/738/problem/D Galya is playing one-dimensional Sea Battle on a 1 × n grid. In this game a ships are placed on the grid. Each of the ships consists of bconsecutive cells. No cell can be part of two ships, however, the shi
1 题目描述: 被给一系列的正整数x1,x2,x3...xn和两个非负整数a和b,通过下面两步操作将a转化为b: 1.对当前的a减1. 2.对当前a减去a % xi (i=1,2...n). 计算a转化到b最小需要的最短步数. 2 输入 第一行包含简单的整数n(1 ≤ n ≤ 10^5),第二行包含n个用空格分开的整数x1,x2,x3...xn(2 ≤ xi ≤ 10^9),第三行包含两个整数a和b(0 ≤ b ≤ a ≤ 10^9, a - b ≤ 10^6). 3 输出 输出一个整数
C. Epidemic in Monstropolis time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output There was an epidemic in Monstropolis and all monsters became sick. To recover, all monsters lined up in queue fo
D. Exams time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Vasiliy has an exam period which will continue for n days. He has to pass exams on m subjects. Subjects are numbered from 1 to m. Ab
UVALive - 3902 Network Consider a tree network with n nodes where the internal nodes correspond to servers and the terminal nodes correspond to clients. The nodes are numbered from 1 to n. Among the servers, there is an original server S which provid