[Python] Same digits (Python) [closed]

We call special number is number that have the same digits like 1, 222, 5555, 88, 777777

Given a list a, given a list call "a" with "n" numbers, find pairs of number in the list which the sum of it is a special number

Example:

Input

5

1 2 3 4 5

Output:

10

Explain:

a0 + a1 = 1 + 2 = 3 (special number)

a0 + a2 = 1 + 3 = 4 (special number)

a0 + a3 = 1 + 4 = 5 (special number)

a0 + a4 = 1 + 5 = 6 (special number)

a1 + a2 = 2 + 3 = 5 (special number)

a1 + a3 = 2 + 4 = 6 (special number)

a1 + a4 = 2 + 5 = 7 (special number)

a2 + a3 = 3 + 4 = 7 (special number)
a2 + a4 = 3 + 5 = 8 (special number)

a3 + a4 = 4 + 5 = 9 (special number)

n < 2*10^5

1 <= ai <= 10^6

Solve under 4s

Continue reading...