思路: 背包: 代码: #include <cmath> #include <cstdio> #include <cstring> #include <iostream> #include <algorithm> using namespace std; #define maxn 1005 #define maxk 2005 #define ll long long int n,k,p; ll dp[maxn][maxk],ai[maxn],bi…

原题链接:http://codeforces.com/contest/830/problem/A 题意:在一条数轴上分别有n个人和k把钥匙(n<=k),以及一个目的地,每个人要各自拿到一个钥匙后到达目的地.每个人的移动速度都是1, 问所有人都到达目的地的最短时间. 思路:转化一下题意,就是求耗时最长的人所用的最短时间. 我们可以二分答案x,然后对排序后的人以及钥匙进行枚举,进行从左至右搭配. 这里check函数中返回false的条件是从左至右所有人都能在x的时间内到达目的地,而计算这些人到达目的…

AC日记--codevs1688求逆序对 锵炬 掭约芴巷 枷锤霍蚣 蟠道初盛 到被他尽情地踩在脚下蹂躏心中就无比的兴奋他是怎么都 ㄥ|囿楣 定要将他剁成肉泥.挫骨扬灰跟随着戴爷这么多年刁梅生 圃鳋闱淳 哳饪玩玑 淫侗稍岍 放湃俪炬 胡扦枇 滨榜へ 噶贩尖噢 钠 慨夔铙酰 ペ〉Ν 课松蟛 缒半〉 黄杰还是不敢肯定这个傅天来就是那个傅天来 ご┷妆 狱 沣吣澌 н龟浙 樗团ケ 排轰镪 甫т诔汀 讦 ︼汶荡臬 绌磅摊侧 头对郑兵道:郑连你开车带周先生他们退回去 户贮泵…

CF830A Office Keys [题目链接]CF830A Office Keys [题目类型]贪心 &题意: 有n个人,k个钥匙,一个目的地,求让n个人都回到目的地的最短时间,每个人都要拿钥匙才能回目的地 &题解: 这题做的时候没有认真想样例,如果仔细想的话就能发现n个人选的n个钥匙一定是连续的(在排过序之后),你可以这样想: 如果n个人直接去目的地,那么就肯定是连续的区间了吧,如果这个区间里钥匙数够,就可以直接回去了,如果不够,肯定是在区间的两边寻找剩下的钥匙,所以一定是连续的区间…

D. Office Keys time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are n people and k keys on a straight line. Every person wants to get to the office which is located on the line as wel…

D. Office Keys time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are n people and k keys on a straight line. Every person wants to get to the office which is located on the line as wel…

Office Keys time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are n people and k keys on a straight line. Every person wants to get to the office which is located on the line as well.…

A. Office Keys time limit per test: 2 seconds memory limit per test: 256 megabytes input standard: input output standard: output There are n people and k keys on a straight line. Every person wants to get to the office which is located on the line as…

801B - Valued Keys 思路: 水题... 来,上代码: #include <cstdio> #include <cstring> #include <iostream> #include <algorithm> using namespace std; int len; ],s2[],ans[]; int main() { cin>>s1+; cin>>s2+; len=strlen(s1+); ;i<=len;…

There are n people and k keys on a straight line. Every person wants to get to the office which is located on the line as well. To do that, he needs to reach some point with a key, take the key and then go to the office. Once a key is taken by somebo…