Content 在一个仅有 \(0,1\) 这两个数的数列上,每次可以选择一段全为1的连续区间将其左移 \(1\) 或者右移 \(1\).现给出 \(t\) 次询问,每次询问给出一个长度为 \(n\) 的满足上述条件的数列,求出使所有为 \(1\) 的位置在唯一一个连续区间的最小操作次数. 数据范围:\(1\leqslant t\leqslant 200,1\leqslant n\leqslant 50\). Solution 每次我们选择全为 \(1\) 的区间向右移,其实就是为了把目标区间中…

比赛链接:https://codeforces.com/contest/1433 A. Boring Apartments 题解 模拟即可. 代码 #include <bits/stdc++.h> using namespace std; int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int t; cin >> t; while (t--) { int n; cin >> n; int ans =…

Description Farmer John recently bought another bookshelf for the cow library, but the shelf is getting filled up quite quickly, and now the only available space is at the top. FJ has N cows (1 ≤ N ≤ 20) each with some height of Hi (1 ≤ Hi ≤ 1,000,00…

本题解法非常多,由于给出的数据特殊性故此能够使用DFS和BFS,也能够使用01背包DP思想来解. 由于一般大家都使用DFS,这里使用非常少人使用的BFS.缺点是比DFS更加耗内存,只是长处是速度比DFS快. 当然也比DFS难写点: int N, B; int Height[21]; inline int mMin(int a, int b) { return a > b? b : a; } inline int mMax(int a, int b) { return a < b? b : a;…

Description Farmer John recently bought another bookshelf for the cow library, but the shelf is getting filled up quite quickly, and now the only available space is at the top. FJ has N cows (1 ≤ N ≤ 20) each with some height of Hi (1 ≤ Hi ≤ 1,000,00…

P.S. 偶然间发现可以用 markdown... [BZOJ2678][Usaco2012 Open]Bookshelf 试题描述 When Farmer John isn't milking cows, stacking haybales, lining up his cows, or building fences, he enjoys sitting down with a good book. Over the years, he has collected \(N\) books (…

题目链接:http://codeforces.com/contest/294/problem/B B. Shaass and Bookshelf time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Shaass has n books. He wants to make a bookshelf for all his books.…

传送门1:http://www.usaco.org/index.php?page=viewproblem2&cpid=138 传送门2:http://www.lydsy.com/JudgeOnline/problem.php?id=2678 最开始没看到要将那些书按顺序放!!一定是按顺序!我还以为是自己安排那个书架,白费了我好久时间. 然而看对题之后仍然不会... 令f(i)表示前i本书已经放到书架上,且第i本是某个书架的最后一本的最小高度和,则 f(i) = min { f(j) + max…

链接:https://ac.nowcoder.com/acm/contest/993/C来源:牛客网 题目描述 Farmer John recently bought another bookshelf for the cow library, but the shelf is getting filled up quite quickly, and now the only available space is at the top. FJ has N cows (1 <= N <= 20)…

Codeforces Round #677 (Div. 3) 题解 A. Boring Apartments 题目 题解 简单签到题,直接数,小于这个数的\(+10\). 代码 #include <bits/stdc++.h> using namespace std; #define ll long long #define IOS ios_base::sync_with_stdio(0); cin.tie(0);cout.tie(0); const int maxn = 2e5 + 10;…