P1561 [USACO12JAN]爬山Mountain Climbing 题目描述 Farmer John has discovered that his cows produce higher quality milk when they are subject to strenuous exercise. He therefore decides to send his N cows (1 <= N <= 25,000) to climb up and then back down a…

https://daniu.luogu.org/problemnew/show/P1561 题目描述 Farmer John has discovered that his cows produce higher quality milk when they are subject to strenuous exercise. He therefore decides to send his N cows (1 <= N <= 25,000) to climb up and then back…

传送门 题目大意: n头牛,上山时间为u(i),下山为d(i). 要求每一时刻最多只有一头牛上山,一头牛下山. 问每头牛都上下山后花费最少时间. 题解:贪心 推了推样例,发现上山时间一定,那找个下山最快 的当最后一头山上的牛. #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> #define LL long long #define N 25009 using…

我对\(Jhonson\)算法的理解:https://www.cnblogs.com/AKMer/p/9863620.html 题目传送门:https://www.luogu.org/problemnew/show/P1561 \(Jhonson\)裸题. 时间复杂度:\(O(nlogn)\) 空间复杂度:\(O(n)\) 代码如下: #include <cstdio> #include <algorithm> using namespace std; const int maxn…

题目描述 Farmer John has discovered that his cows produce higher quality milk when they are subject to strenuous exercise. He therefore decides to send his N cows (1 <= N <= 25,000) to climb up and then back down a nearby mountain! Cow i takes U(i) time…

UPX壳,手脱后打不开,可能是在windows10脱壳的缘故吧.放在XP虚拟机上手脱可能会好,但是提示缺少dll.无奈,智能用工具了. 用的这个,感觉蛮好用的. 先打开程序.随便输入一个数,提示error IDA中找到相应字符串. F5反编译 可以看到,在while循环里面,限制我们输入的字符串必须是L或者R.当时我就输入了19个L,结果提示了error.按照代码的逻辑来看,讲道理是不可能出现这种情况的. 后来想可能是这个sub_41114F函数有问题,但是当我在IDA中查看时,出现了下面的情况…

Description Farmer John has discovered that his cows produce higher quality milk when they are subject to strenuous exercise. He therefore decides to send his N cows (1 <= N <= 25,000) to climb up and then back down a nearby mountain! Cow i takes U(…

2021-10-14 P2577 [ZJOI2004]午餐 2021-10-13 CF815C Karen and Supermarket(小小紫题,可笑可笑) P6748 『MdOI R3』Fallen Lord(sort(a+1,a+1+n,greater<int>()); 真好用) P4161 [SCOI2009]游戏 P1707 刷题比赛 2021-10-12 CF1573A Countdown P2717 寒假作业 P7868 [COCI2015-2016#2] VUDU P1660…

著作权归作者所有.商业转载请联系作者获得授权,非商业转载请注明出处.作者:匿名用户链接:http://www.zhihu.com/question/30087053/answer/47815698来源:知乎 Benson Farb:晨兴通俗报告How to do Mathematics文稿(z) 晨兴通俗报告How to do Mathematics文稿(任金波整理,欢迎纠错) 以下是我整理并翻译成汉语的,本人才疏学浅,有些地方实在没听懂,其余部分难免也有很多错误,翻译的汉语对演讲者的意思的传达…

目录 入门逆向 Easy_vb Easy_Re 游戏过关 Timer(阿里CTF) 逆向入门 love LoopAndLoop(阿里CTF) easy-100(LCTF) SafeBox(NJCTF) Mountain climbing 前言:在bugku上把能写的逆向都写了,由于大佬们的writeup太深奥或者说太简洁了让我(小白)看得云里雾里.所以我写了这个详细点的writeup(理解错的地方望指出),尽量让大家都看得懂.最近比较忙先写到了这里,未完待续 入门逆向 下载后ida打开,双击_m…