题目 这道题是个水题,写博客上的人好像都不屑于写这这道题.但是我为什么还是觉得挺难的呢? 我也是看了别人的博客才过了的,感觉这种写法很新颖,这样就可以不用在排序了. 下面给出正解: #include<cstdio> #include<iostream> using namespace std; int S[10000000+5]; int min(int a,int b) { return a<b? a:b; } int main() { int n,i; int a =1,…

四道题的难度: 2591<1338<2545<2247 POJ 2591 Set Definition: 这是从discuss里看来的,写的挺好,直接copy,根据我的代码稍有改动(其实也就只改动了一个数字): 题目所给的是个简单的双递归. 我们注意到任何新的元素必然是集合中较小的元素经过两种之一的递推得到的.这启发我们两个设置标记(比如two,three两个变量):第一个是以方式乘2加1递推,two是没有用过的最小项下标,第二则表示以乘3加1的方式递推,three是没有用过的最小项下标…

#include<iostream> #include<stdio.h> #define MAXN 10000001 using namespace std; int a[MAXN]; void give_set(); int min(int i,int j); int main() { //freopen("acm.acm","r",stdin); give_set(); int num; while(cin>>num) { c…

[题意简述]:就是有这种一个序列.就拿当p1 = 2,p2 = 3, p3 = 5,来举例.由这三个数为基准组成的序列是: 2,3,4,5,6,8,9,10,12--如今给你这个序列数组的下标,让你求得这个数组中,这个下标里的数是多少. [分析]:2,3,4,5,6,8,9,10,12--这个序列式由2,3,5这三个数生成的,详细怎样生成,就是: 详见代码: 这里以POJ2545为例: //弄清当中的逻辑关系,能够从最简单的2,3,5试着做起! #include<iostream> #incl…

POJ - 1245 Programmer, Rank Thyself Time Limit: 1000MS Memory Limit: 10000KB 64bit IO Format: %I64d & %I64u [Submit]   [Go Back]   [Status] Description Implement a ranking program similar to the one used for this programming contest. Input The input …

  HDU 1272 I - 小希的迷宫 Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 1272 Appoint description: Description 上次Gardon的迷宫城堡小希玩了很久(见Problem B),现在她也想设计一个迷宫让Gardon来走.但是她设计迷宫的思路不一样,首先她认为所有的通道都应该是双向连通的,…

Description 题目描述 While skimming his phone directory in 1982, Albert Wilansky, a mathematician of Lehigh University, noticed that the telephone number of his brother-in-law H. Smith had the following peculiar property: The sum of the digits of that nu…

题目连接 http://poj.org/problem?id=1679 The Unique MST Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree): Consider a connected, undirected graph G = (V, E). A spanning tree of G is a…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 22668   Accepted: 8038 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree): Consider a connected, undire…

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…

http://poj.org/problem?id=1679 The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 17726   Accepted: 6150 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree…

Description A tree is a well-known data structure that is either empty (null, void, nothing) or is a set of one or more nodes connected by directed edges between nodes satisfying the following properties. There is exactly one node, called the root, t…

Description Given a connected undirected graph, tell if its minimum spanning tree is unique.  Definition 1 (Spanning Tree): Consider a connected, undirected graph G = (V, E). A spanning tree of G is a subgraph of G, say T = (V', E'), with the followi…

http://poj.org/problem?id=2955 Description We give the following inductive definition of a “regular brackets” sequence: the empty sequence is a regular brackets sequence, if s is a regular brackets sequence, then (s) and [s] are regular brackets sequ…

题目链接: http://poj.org/problem?id=1679 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree): Consider a connected, undirected graph G = (V, E). A spanning tree of G is a subgraph of G…

链接: http://poj.org/problem?id=1679 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=82831#problem/K Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 24594   Accepted: 8751 Description Given a connected undirected graph, tell if its m…

题目链接:http://poj.org/problem?id=1679 The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 29408   Accepted: 10520 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spannin…

Approximations Time Limit: 2000MS   Memory Limit: 131072K Total Submissions: 419   Accepted: 23 Description For any decimal fraction, we can obtain a set of approximations of different accuracy by mean of rounding. Take 0.2503 for example, we have th…

Help with Intervals Time Limit: 6000MS   Memory Limit: 131072K Total Submissions: 12474   Accepted: 3140 Case Time Limit: 2000MS Description LogLoader, Inc. is a company specialized in providing products for analyzing logs. While Ikki is working on g…

传送门:http://poj.org/problem?id=2955 Brackets Time Limit: 1000MS Memory Limit: 65536K Description We give the following inductive definition of a "regular brackets" sequence: the empty sequence is a regular brackets sequence, if s is a regular bra…

POJ在评阅习题时需要向程序提供输入数据,并获取程序的输出结果.因此提交的程序需按照每个习题具体的输入输出格式要求处理输入输出.有的时候,测评系统给出程序的评判结果是“数据错误”或“结果错误”,有可能就与没有正确使用输入输出格式有关. POJ要求的输出一般有3种情况. (1)输出一个数据:数据后加换行. (2)输出一行数据:数据间用一个空格间隔(或指定的间隔符),行尾加换行(换行前可有一个空格). (3)输出多行数据:每行的数据间用一个空格间隔(或指定的间隔符),行尾只加换行. 除了少数题目没有…

http://poj.org/problem?id=1679 Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 30120   Accepted: 10778 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree): Consider a…

题目链接:POJ 3130 Problem Description After counting so many stars in the sky in his childhood, Isaac, now an astronomer and a mathematician uses a big astronomical telescope and lets his image processing program count stars. The hardest part of the prog…

Halloween treats Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 7644   Accepted: 2798   Special Judge Description Every year there is the same problem at Halloween: Each neighbour is only willing to give a certain total number of sweets…

Find a multiple Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 7192   Accepted: 3138   Special Judge Description The input contains N natural (i.e. positive integer) numbers ( N <= 10000 ). Each of that numbers is not greater than 15000…

The Pilots Brothers' refrigerator Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 22286   Accepted: 8603   Special Judge Description The game “The Pilots Brothers: following the stripy elephant” has a quest where a player needs to open a…

Flip Game Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 37427   Accepted: 16288 Description Flip game is played on a rectangular 4x4 field with two-sided pieces placed on each of its 16 squares. One side of each piece is white and the…

Corn Fields Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 9806   Accepted: 5185 Description Farmer John has purchased a lush new rectangular pasture composed of M by N (1 ≤ M ≤ 12; 1 ≤ N ≤ 12) square parcels. He wants to grow some yumm…

Sum of Consecutive Prime Numbers Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 20050   Accepted: 10989 Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representatio…

Tree Recovery Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 11939   Accepted: 7493 Description Little Valentine liked playing with binary trees very much. Her favorite game was constructing randomly looking binary trees with capital le…