The math exam starts now. Participate with integrity and never cheat.

Someone has stolen the exam paper, and definitely he got full marks. Fortunately, he didn't find the flag.

!/bin/bash

echo "You are now in the math examination hall." echo "First, please read exam integrity statement:" echo ""

promisetext="I promise to play fairly and not to cheat. In case of violation, I voluntarily accept punishment" echo "$promisetext" echo ""

echo "Now, write down the exam integrity statement here:" read userinput

if [ "$userinput" = "$promisetext" ] then echo "All right" else echo "Error" exit fi

echo "" echo "Exam starts" echo "(notice: numbers in dec, oct or hex format are all accepted)" echo ""

correctcount=0 for i in {1..100} do echo "Problem $i of 100:" echo "$i + $i = ?"

ans=$(($i+$i))
read line

if [[ "$line" -eq "$ans" ]]
then
    correctcount="$(($correctcount+1))"
fi
echo ""

done

echo "Exam finishes" echo "You score is: $correctcount"

exit