大致题意:使用三进制砝码采取相应的措施衡量出给定的数字主要思路:三进制,如果 大于 2 向前进位,之前一直没写好放弃了,这次终于写好了…… #include <iostream> #include <cstdio> #include <cstdlib> #include <algorithm> #include <map> #include <cmath> #include <cstring> #include <s…

本题大意: 用天平对一物品进行称重,现有重量不同的砝码,砝码的重量分别为:1,3,9,27,..,3^n.(n<20) 天平的右侧放砝码,左侧放物品或物品和砝码,使得左右两边的重量相等. 现有一个物品,计算左右两边应当分别放多少个多大的砝码才能使得天平平衡. 例如:现在有一个重量为21的物品,当左侧放物品和重量为9的砝码,右边放重量为27和3的砝码时,天平平衡. Sample Input 4 2 3 21 250 Sample Output left pan: 1 right pan: 3 le…

二分答案. 思路:对于二分给定的mid,即当前允许移动的最大重量,我们可以把小于改重量的标记一下,然后把没有标记的按照顺序放到另一个数组,然后判断是否满足两两相同. #include<bits/stdc++.h> using namespace std; ; int arr[N]; int brr[N]; int crr[N]; bool mark[N],mark1[N]; ; const int mm=1e9; int n; bool judge(int x){ memset(mark,,s…

Deep Learning in a Nutshell: History and Training This series of blog posts aims to provide an intuitive and gentle introduction to deep learning that does not rely heavily on math or theoretical constructs. The first part in this series provided an…

B. Clique Problem time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output The clique problem is one of the most well-known NP-complete problems. Under some simplification it can be formulated as f…

http://codeforces.com/contest/472/problem/D D. Design Tutorial: Inverse the Problem time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There is an easy way to obtain a new task from an old on…

[codeforces 528]B. Clique Problem 试题描述 The clique problem is one of the most well-known NP-complete problems. Under some simplification it can be formulated as follows. Consider an undirected graph G. It is required to find a subset of vertices C of…

UVa 10154 - Weights and Measures I know, up on top you are seeing great sights,  But down at the bottom, we, too, should have rights.  We turtles can't stand it. Our shells will all crack!  Besides, we need food. We are starving!" groaned Mack. The P…

http://poj.org/problem?id=1679 The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 23339   Accepted: 8284 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree…

Problem H. Hard TestTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100342/attachments Description Andrew is having a hard time preparing his 239-th contest for Petrozavodsk. This time the solution to the problem is based on Di…