Tester

@echo off
for /l %%x in (1, 1, 1000) do (
    echo %%x
    gen %%x > in.in
    a < in.in > out.out
    b   < in.in > out2.out
    fc /w out.out out2.out > diagnostics || (
        echo Wrong Answer
        exit /b
    )

)
echo Accepted