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General I/O?

Please use standard in and standard out!

Input --
Java: Scanner in = new Scanner(new BufferedReader(new InputStreamReader(;
C: scanf("%d %d", &integer1, &integer2);
C++: int x; cin >> x;

Output --
Java: System.out.println("asdf");
C: printf("%d %d", integer1, integer2);
C++: int x = 5; cout << x << endl;
General Java class names?

Java class names?

Please use the following class names (make sure classes are public):

Problem A - public class A { ... }
Problem B - public class B { ... }
. . .
General Compilers?

gcc 4.8.1
javac 1.7.0_51
python 2.7.6
K - Train Passengers Can we assume that for a given station, any passenger that leaves the train is not part of the crowd that waits for the train?

Have not read K, will do so and report back.

Update: you can assume that the people leaving are different than the people waiting.
General Why is the judge so slow now?

It is fixed now.
F - Particle Swapping Has the judge been properly test for this problem?

I'm not sure -- I didn't set the contest. I'll take a look at your submissions.

Update: looks like you're answering zero on several test cases. May want to check that.

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