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Nth number made of prime digits
Easy Accuracy: 66.16% Submissions: 4156 Points: 2

Given a number 'N'. The task is to find the Nth number whose each digit is a prime number i.e 2, 3, 5, 7. In other words you have to find nth number of this sequence : 2, 3, 5, 7, 22, 23 ,.. and so on.

Example 1:

Input:
N = 10
Output: 33
Explanation:10th number in the sequence of
numbers whose each digit is prime is 33.

Example 2:

Input:
N = 21
Output: 222
Explanation:21st number in the sequence of
numbers whose each digit is prime is 222.

Your Task:
Complete primeDigits function and return the nth number of the given sequence made of prime digits.

Constraints:
1 <= N <= 100
 

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Nth number made of prime digits

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