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Test for Job
Description Mr.Dog
was fired by his company. In order to support his family, he must find
a new job as soon as possible. Nowadays, It's hard to have a job, since
there are swelling numbers of the unemployed. So some companies often
use hard tests for their recruitment. The test is like this:
starting from a source-city, you may pass through some directed roads
to reach another city. Each time you reach a city, you can earn some
profit or pay some fee, Let this process continue until you reach a
target-city. The boss will compute the expense you spent for your trip
and the profit you have just obtained. Finally, he will decide whether
you can be hired. In order to get the job, Mr.Dog managed to obtain the knowledge of the net profit Vi of all cities he may reach (a negative Vi
indicates that money is spent rather than gained) and the connection
between cities. A city with no roads leading to it is a source-city and
a city with no roads leading to other cities is a target-city. The
mission of Mr.Dog is to start from a source-city and choose a route
leading to a target-city through which he can get the maximum profit. Input Output Sample Input Sample Output Hint Source |
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