51Nod - 1413 权势二进制 题意:就是讲给出一个数n,让你求最少由多少个像0,1,10,11......这样的二进制数相加构成:样例n=9就是由9个二进制1相加组成,我不懂比赛的时候我为什么没有看懂题目在讲什么:再举个例子吧!n=2333 就有二进制1111,1111,111三个数相加而成: 代码: #include<iostream> #include<cstdio> #include<cmath> using namespace std; int main…

这一周学的图论,学了这么些 两种存图的方法:邻接矩阵( map[n][n] ) , 邻接表( headlis[n] , vector<int> G[n] )存图的方法,各有各的好,我的理解是,如果不是那种非常稠密的图,类似于完全图这样的图,邻接表一般会快很多,毕竟减少了边的遍历. 最小生成树 kruskal这个算法现在感觉是到的用处是,求将所有点连通起来,并且边的权值之和最小的一种算法,首先,将边按边的权值升序排序,每次选取最小的边,如果没有连通,就连通起来,并记录权值,用一个并查集确定两点是…

Description You are in a cave, a long cave! The cave can be represented by a 1 x N grid. Each cell of the cave can contain any amount of gold. Initially you are in position 1. Now each turn you throw a perfect 6 sided dice. If you get X in the dice a…

Description Gerald got a very curious hexagon for his birthday. The boy found out that all the angles of the hexagon are equal to . Then he measured the length of its sides, and found that each of them is equal to an integer number of centimeters. Th…

Description   During the early stages of the Manhattan Project, the dangers of the new radioctive materials were not widely known. Vast new factory cities were built to manufacture uranium and plu- tonium in bulk. Compounds and solutions of these sub…

Description In the Fibonacci integer sequence, F0 = 0, F1 = 1, and Fn = Fn − 1 + Fn − 2 for n ≥ 2. For example, the first ten terms of the Fibonacci sequence are: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, … An alternative formula for the Fibonacci sequence is…

Description 大家常常感慨,要做好一件事情真的不容易,确实,失败比成功容易多了! 做好“一件”事情尚且不易,若想永远成功而总从不失败,那更是难上加难了,就像花钱总是比挣钱容易的道理一样. 话虽这样说,我还是要告诉大家,要想失败到一定程度也是不容易的.比如,我高中的时候,就有一个神奇的女生,在英语考试的时候,竟然把40个单项选择题全部做错了!大家都学过概率论,应该知道出现这种情况的概率,所以至今我都觉得这是一件神奇的事情.如果套用一句经典的评语,我们可以这样总结:一个人做错一道选择题并不…

Description Tomorrow is contest day, Are you all ready? We have been training for 45 days, and all guys must be tired.But , you are so lucky comparing with many excellent boys who have no chance to attend the Province-Final. Now, your task is relaxin…

Description The Sky is Sprite. The Birds is Fly in the Sky. The Wind is Wonderful. Blew Throw the Trees Trees are Shaking, Leaves are Falling. Lovers Walk passing, and so are You. ................................Write in English class by yifenfei Gir…

N - 概率 Time Limit:4000MS     Memory Limit:32768KB     64bit IO Format:%lld & %llu Submit Status Description As Harry Potter series is over, Harry has no job. Since he wants to make quick money, (he wants everything quick!) so he decided to rob banks.…