Helper programs

TCFrame's local grading system allows the use of helper programs, which includes scorer and communicator programs. This is the format that complies with TCFrame's local grading system. If your grading system expects a different format, please adjust the helper programs before setting up the problem there.

Scorer

A scorer reads the contestant's output and then outputs the verdict.

Input
argv[1]	test case input filename
argv[2]	test case output filename
argv[3]	contestant's output filename

Output
stdout	verdict (see the format in the next section)

Here is an example scorer which gives AC if the contestant's output differs not more than 1e-9 from the official output.

scorer.cpp

#include <bits/stdc++.h>
using namespace std;

int wa() {
    cout << "WA" << endl;
    return 0;
}

int ac() {
    cout << "AC" << endl;
    return 0;
}

int main(int argc, char* argv[]) {
    ifstream tc_in(argv[1]);
    ifstream tc_out(argv[2]);
    ifstream con_out(argv[3]);

    double tc_ans;
    tc_out >> tc_ans;

    double con_ans;
    if (!(con_out >> con_ans)) {
        return wa();
    }

    if (abs(tc_ans - con_ans) < 1e-9) {
        return ac();
    } else {
        return wa();
    }
}

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Communicator

A communicator communicates with the contestant's solution program via stdin/stdout, and then outputs the verdict to stderr.

Input
argv[1]	test case input filename
stdin	input from contestant's program

Output
stdout	output to contestant's program
stderr	verdict (see the format in the next section)

Make sure the communicator flushes after every time it writes output.

Here is an example communicator program in a typical binary search problem.

communicator.cpp

#include <bits/stdc++.h>
using namespace std;

int ac() {
    cerr << "AC" << endl;
    return 0;
}

int wa() {
    cerr << "WA" << endl;
    return 0;
}

int main(int argc, char* argv[]) {
    ifstream tc_in(argv[1]);

    int N;
    tc_in >> N;

    int guesses_count = 0;

    while (true) {
        int guess;
        cin >> guess;

        guesses_count++;

        if (guesses_count > 10) {
            return wa();
        } else if (guess < N) {
            cout << "TOO_SMALL" << endl;
        } else if (guess > N) {
            cout << "TOO_LARGE" << endl;
        } else {
            return ac();
        }
    }
}

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Verdict format

A scorer and communicator should output the verdict of a test case in the following format:

Verdict	Meaning
AC	The solution receives full points.
WA	The solution receives zero points.
OK X	The solution receives partial points, which is X. X can be a floating point. E.g.: OK 71
OK P%	The solution receives partial points, which is P% of the full points. E.g.: OK 50%