actual = [0]*19+[1]
predicted = [0]*20
correct = sum(a==p for a,p in zip(actual,predicted,strict=True))
positives = sum(actual)
hits = sum(a==1 and p==1 for a,p in zip(actual,predicted,strict=True))
print(f"accuracy: {correct/len(actual):.2f}")
print(f"positive recall: {hits/positives:.2f}")