用于基本的输入操作!(比如:常用语acm编程中,输入效率比较高。) BufferedReaderprovides quite fast read operations for almost all problems. But this class may be used to read single characters and lines only. To read tokens and numbers you should useStringTokenizerorStreamTokenizer. importjava.io.*;pu...
题意是这样,ACM比赛,T个队,M个题,第i个队做出第j个题的概率为pi,j,求所有队至少做一题并且冠军队(可能有多个队)做出N题以上的概率 首先,每个队是独立的。 设dp[i][j]为前i个题目做出j题的概率,有dp方程dp[i][j]=dp[i-1][j-1]*(p[pos][i])+dp[i-1][j]*(1-p[pos][i]) 边界条件:...