33 人解决，39 人已尝试。
40 份提交通过，共有 122 份提交。
4.1 EMB 奖励。
单点时限: 5.0 sec
内存限制: 256 MB
A group of N Internet Service Provider companies (ISPs) use a private communication channel that has a maximum capacity of C traffic units per second. Each company transfers T traffic units per second through the channel and gets a profit that is directly proportional to the factor T(C - T N). The problem is to compute T_optim, the smallest value of T that maximizes the total profit the N ISPs can get from using the channel. Notice that N, C, T, and T_optim are integer numbers.
Write a program that reads sets of data from an input text file. Each data set corresponds to an instance of the problem above and contains two integral numbers – N and C – with values in the range from 0 to 109. The input data are separated by white spaces, are correct, and terminate with an end of file. For each data set the program computes the value of T_optim according to the problem instance that corresponds to the data set.
The result is printed on the standard output from the beginning of a line. There must be no empty lines on the output. An example of input/output is shown below.
1 0 0 1 4 3 2 8 3 27 25 1000000000
0 0 0 2 4 20000000
33 人解决，39 人已尝试。
40 份提交通过，共有 122 份提交。
4.1 EMB 奖励。
创建: 15 年，1 月前.
修改: 7 年，3 月前.
最后提交: 10 月，3 周前.