mark = int(input("Enter your number: "))

if mark>=80:
    print("Congrats, your grade is A+")
elif mark>=70:
    print("Congrats, your grade is A")
elif mark>=60:
    print("Congrats, your grade is B")
elif mark>=50:
    print("Congrats, your grade is C")
elif mark>=40:
    print("Congrats, your grade is D")
if mark<30:
    print("Alas! You have failed")

'''
num = int(input("Enter a ingeger number: "))

if num%2==0:
    print("Even")
else:
    print("Odd")
'''
