# Simple mathematics game
# Player has to answer 10 questions.
# Print score after all questions have been answered.
# Messages for 6 or fewer correct, 7 or 8 correct, 9 or 10 correct.
# No error-checking at this point.
import random
correct = 0
cor = ("Great!","Good job!","Correct!")
inc = ("Sorry.","Sadly no.","Incorrect.")
diff = input("Difficulty? (E)asy, (M)edium, (H)ard: ")
if diff == "E":
    high = 12
elif diff == "M":
    high = 20
else:
    high = 30
streak = 0
for count in range(1,11):
    n1 = random.randint(2,high)
    n2 = random.randint(2,high)
    operation = random.choice("+-*/")
    if operation == "+":
        question = str(n1)+" + "+str(n2)
        answer = n1+n2
    elif operation == "-":
        question = str(max(n1,n2))+" - "+str(min(n1,n2))
        answer = abs(n1-n2)
    elif operation == "*":
        question = str(n1)+" * "+str(n2)
        answer = n1*n2
    else:
        question = str(n1*n2)+" / "+str(n2)
        answer = n1
    prompt = "Question #"+str(count)+": What is "+question+"? "
    guess = int(input(prompt))
    if guess == answer:
        correct += 1
        streak += 1
        print(random.choice(cor))
    else:
        streak = 0
        print(random.choice(inc))
    if streak == 3:
        print("You're on a streak!")
    elif streak > 3:
        print("Keep that streak going!")
print("You scored", correct, "out of 10.")
if correct <= 6:
    print("Looks like you need more practice.")
elif correct <= 8:
    print("Not too bad.")
else:
    print("Super!")