B. Collecting Bugs Time Limit: 10000ms Memory Limit: 64000KB 64-bit integer IO format: %lld      Java class name: Main Special Judge   Ivan is fond of collecting. Unlike other people who collect post stamps, coins or other material stuff, he collects…

炮兵阵地 Time Limit: 2000ms Memory Limit: 65536KB This problem will be judged on PKU. Original ID: 118564-bit integer IO format: %lld      Java class name: Main   司令部的将军们打算在N*M的网格地图上部署他们的炮兵部队.一个N*M的地图由N行M列组成,地图的每一格可能是山地(用"H" 表示),也可能是平原(用"P"…

偷一波翻译: 工程师可以花费一天去找出一个漏洞——这个漏洞可以是以前出现过的种类,也可能是未曾出现过的种类,同时,这个漏洞出现在每个系统的概率相同.要求得出找到n种漏洞,并且在每个系统中均发现漏洞的期望天数. Translated By 大米饼 求期望天数...那就推式子吧:dp[i][j]表示已经找出了i个漏洞,已经出现在了j个系统中的期望天数 $$dp[i][j]=(dp[i][j]+1)*\frac{i*j}{s*n}+(dp[i][j+1]+1)*\frac{i*(s-j)}{n*s}+…

Collecting Bugs Time Limit: 10000MS   Memory Limit: 64000K Total Submissions: 1792   Accepted: 832 Case Time Limit: 2000MS   Special Judge Description Ivan is fond of collecting. Unlike other people who collect post stamps, coins or other material st…

                                                            Collecting Bugs Time Limit: 10000MS   Memory Limit: 64000K Total Submissions: 1899   Accepted: 901 Case Time Limit: 2000MS   Special Judge Description Ivan is fond of collecting. Unlike othe…

题目链接: http://poj.org/problem?id=2096 Collecting Bugs Time Limit: 10000MSMemory Limit: 64000K 问题描述 Ivan is fond of collecting. Unlike other people who collect post stamps, coins or other material stuff, he collects software bugs. When Ivan gets a new…

Collecting Bugs Time Limit: 10000MS   Memory Limit: 64000K Total Submissions: 5394   Accepted: 2670 Case Time Limit: 2000MS   Special Judge Description Ivan is fond of collecting. Unlike other people who collect post stamps, coins or other material s…

Collecting Bugs Time Limit: 10000MS   Memory Limit: 64000K Total Submissions: 2745   Accepted: 1345 Case Time Limit: 2000MS   Special Judge Description Ivan is fond of collecting. Unlike other people who collect post stamps, coins or other material s…

Collecting Bugs Time Limit: 10000MS   Memory Limit: 64000K Total Submissions: 3523   Accepted: 1740 Case Time Limit: 2000MS   Special Judge Description Ivan is fond of collecting. Unlike other people who collect post stamps, coins or other material s…

Collecting Bugs Ivan is fond of collecting. Unlike other people who collect post stamps, coins or other material stuff, he collects software bugs. When Ivan gets a new program, he classifies all possible bugs into n categories. Each day he discovers…