import random

n = int(input("Choose the Set of Numbers from 0 to N: \n-> "))
count = 0
a = b = rem = 0

product = 1


for i in range (1, n + 1):
    try:
        a = random.randint(0, n)
        b = random.randint(0, n)
        product = a * b
        rem = product % 10
        if rem == 0:
            count += 1
    except ValueError:
        print("Only Integers please!")


print(f"The Number of 0's in last places are {count}")