import math

def input_validator(inputMsg, errMsg, limit1, limit2):
    try:
        number = int(input(inputMsg))

        if number <= limit1 or limit2 <= number:
            raise Exception(errMsg)
        return number
    except ValueError:
        print('This is number is not an integer!')
    except Exception as e:
        print(e)

n = input_validator('Enter n: ', 'Invalid number n!', 15, 35)

list1 = []

for _ in range(n):
    k = input_validator('Enter number k: ', 'Invalid number k!', 29, 301)
    list1.append(k)

counter = 0
for num in list1:
    dozens = num // 10 % 10

    if dozens % 3 == 0:
        counter += 1

print(f'Count is {counter}')
# !!!!
list2 = [x for x in list1 if x % 6 == 4]
minNumber = min(list2)
smallestNumber = list1.index(minNumber)
print(f'Smallest number {smallestNumber}')

list3 = [x for x in list1 if len(str(x)) == 2 and x % 2 == 0 or x % 3 == 0]

oddIndexNumbers = [list3[i] for i in range(len(list3)) if i % 2 == 1]

avg = sum(oddIndexNumbers) / len(oddIndexNumbers)
print(f'Avg: {avg}')

minEvenNumbers = [x for x in list3 if x % 2 == 0]
minNum = min(minEvenNumbers)
print(f'Min: {minNum}')

list3.remove(minNum)