求掷骰子n次,点数之和超过m的概率有多大?分数表示. 两种方法: 1.直接DP.用两个数组分别表示分子和分母,注意计算过程中时时约分. 2.将(x1+x2+x3+x4+x5+x6)n多项式展开,把大于m的幂的系数累加,比上所有项系数的总和就是答案了.这个理解也很容易. 召唤代码君: #include <iostream> #include <cstdio> #include <cstring> typedef long long ll; using namespace…

最近跑程序时出现了这么一个问题: terminate called after throwing an instance of 'std::bad_alloc' what(): std::bad_alloc Aborted (core dumped) 出现此问题一般都是数据量太大,同时跑太多程序造成的,比如我经常会同时打开十多个终端界面,跑不同的脚本,就容易出现这种问题.解决方法很简单,不要同时跑这么多程序,一个个跑.…

Throwing cards away I   Given is an ordered deck of n cards numbered 1 to n with card 1 at the top and card n at the bottom. The following operation is performed as long as there are at least two cards in the deck:  Throw away the top card and move t…

原题 Throwing cards away I   Given is an ordered deck of n cards numbered 1 to n with card 1 at the top and card n at the bottom. The following operation is performed as long as there are at least two cards in the deck:   Throw away the top card and mo…

lightOJ  1317  Throwing Balls into the Baskets(期望)  解题报告 题目链接:http://acm.hust.edu.cn/vjudge/contest/view.action?cid=88890#problem/A 题目: Description You probably have played the game "Throwing Balls into the Basket". It is a simple game. You have…

题目: Problem B: Throwing cards away I Given is an ordered deck of n cards numbered 1 to n with card 1 at the top and card n at the bottom. The following operation is performed as long as there are at least two cards in the deck: Throw away the top car…

书上具体所有题目:http://pan.baidu.com/s/1hssH0KO 代码:(Accepted,0 ms) //UVa10935 - Throwing cards away I #include<iostream> #include<queue> int N; int main() { //freopen("in.txt", "r", stdin); while (scanf("%d", &N) !=…

来源 Q: I've read plenty of articles (and a couple of other similar questions that were posted on StackOverflow) about how and when to use assertions, and I understood them well. But still, I don't understand what kind of motivation should drive me to…

最近在开发的时候遇到了一个很坑的问题,在三星6.0手机上请求接口时候报了一个异常:Throwing new exception 'length=1658; index=3248' with unexpected pending exception: java.lang.ArrayIndexOutOfBoundsException: length=1658; index=3248.我们的网络用的是retrofit,目前可以确定的是由于retrofit2和gradle的settings配置下的Ins…

 Throwing cards away I Given is an ordered deck of  n  cards numbered 1 to n  with card 1 at the top and card  n  at the bottom. The following operation is performed as long as there are at least two cards in the deck: Throw away the top card and m…