ANSLEAK scoring doubt

I got an AC verdict in ANSLEAK, but 0/100 points
What does this mean exactly?

Read the problem statement, they have clearly explained the scoring. The answer to your question is definitely there (since the contest is ongoing, I can’t explicitly explain the answer).

You will get AC verdict as long as your syntax is correct. Your score will be the weighted average of the marks your code will print for the test cases.