Ask some questions on skills and behaviors. What programming languages do you know? Talk about yourself.

Two coding problems: explain the problems and algorithms. One problem is self-descriptive number, and another one is reconstructive digits.

Coding problems: An integer is said to be self-descriptive if it has the property that, when digit positions are labeled 0 to N-1, the digit in each position is equal to the number of times that this digit appears in the number.

Write a function that will check whether a given positive integer is self-descriptive.

LeetCode 423.