Transport Ship 25.78% 1000ms 65536K   There are NN different kinds of transport ships on the port. The i^{th}ith kind of ship can carry the weight of V[i]V[i] and the number of the i^{th}ith kind of ship is 2^{C[i]} - 12C[i]−1. How many different sch…

There are NN different kinds of transport ships on the port. The i^{th}ith kind of ship can carry the weight of V[i]V[i] and the number of the i^{th}ith kind of ship is 2^{C[i]} - 12C[i]−1. How many different schemes there are if you want to use thes…

题目顺序:A F G H I K L 做题链接 A. Magic Mirror 题意:判断 给出的 字符串 是否等于"jessie",需要判断大小写 题解:1.用stl库 tolower ... 2.用ascii码将大写转换为小写,例如: 'A' + 32 = 'a' *F. Modular Production Line 题解:网络流最长区间K覆盖问题, 洛谷P3358 参考题解 参考代码 G. Give Candies 题意:n个小朋友,n个糖,每个小朋友按顺序拿随机数量个糖,直到…

题意:四个操作,区间加,区间每个数乘,区间的数变成 2^64-1-x,求区间和. 题解:2^64-1-x=(2^64-1)-x 因为模数为2^64,-x%2^64=-1*x%2^64 由负数取模的性质可知 也就 =(2^64-1)*x%2^64 所以 2^64-1-x=2^64-1+(2^64-1)*x 所以第三个操作也就变成了区间乘 和区间加.  然后就是树剖加线段树多重标记.表示这是第一次写多重标记,整体凭感觉,细节看题解,树剖有点点遗忘,不过还好.今天看群里说邀请赛没什么价值,,细想一下那…

There are N different kinds of transport ships on the port. The ith kind of ship can carry the weight of V[i]V[i] and the number of the ith kind of ship is 2c[i]-12^{C[i]} - 12. How many different schemes there are if you want to use these ships to t…

题目链接 题意 : 给出若干个物品的数量和单个的重量.问你能不能刚好组成总重 S 分析 : 由于物品过多.想到二进制优化 其实这篇博客就是存个二进制优化的写法 关于二进制优化的详情.百度一下有更多资料 #include<bits/stdc++.h> #define LL long long #define ULL unsigned long long #define scl(i) scanf("%lld", &i) #define scll(i, j) scanf(…

https://nanti.jisuanke.com/t/31720 题意 t组样例,n种船只,q个询问,接下来n行给你每种船只的信息:v[i]表示这个船只的载重,c[i]表示这种船只有2^(c[i]−1)只. 对于每个询问,求用这些船装s的货物的方案数有多少,用到的船必须装满. 分析 一眼就是背包类的题,多重背包求方案数,将数量为m的物体分为log2(m)种物体,然后做01背包.在这里只需改改多重背包模板的转移式子就好. 背包九讲小总结:https://www.cnblogs.com/fht-…

A prince of the Science Continent was imprisoned in a castle because of his contempt for mathematics when he was young, and was entangled in some mathematical curses. He studied hard until he reached adulthood and decided to use his knowledge to esca…

You ye Jiu yuan is the daughter of the Great GOD Emancipator. And when she becomes an adult, she will be queen of Tusikur, so she wanted to travel the world while she was still young. In a country, she found a small pub called Whitehouse. Just as she…

God Water likes to eat meat, fish and chocolate very much, but unfortunately, the doctor tells him that some sequence of eating will make them poisonous. Every hour, God Water will eat one kind of food among meat, fish and chocolate. If there are 33 …