Question

Write a Python program that reads a number and finds the sum of the series

of 1 + 33 + 111 + 3333 +....+N terms. Then it puts the reverse digit of the sum to a list and prints it. [Cannot use built-in reverse() or reversed()]

Sample Input 1:

5

Sample Output 1:

Sum of series: 14589 Reverse sum of series in list: [9, 8, 5, 4, 1]

Answer 1

n = int(input())
s = 0
for i in range(n):
	indx = i%2
	if indx == 0:
		s += int(''.join(['1' for _ in range(i+1)]))
	else:
		s += int(''.join(['3' for _ in range(i+1)]))
res = []
for num in str(s)[::-1]:
	res.append(int(num))
print(res)