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Given a number **N**, count the numbers from **1** to **N** which comprise of digits** only** from set {1, 2, 3, 4, 5}.

**Example 1:**

**Input:
**N = 20
**Output:** 10
**Explanation:** The numbers whose digits
are from the given set are:
1, 2, 3, 4, 5, 11, 12, 13, 14, 15.

**Example 2:**

**Input:
**N = 100
**Output:** 30

**Your Task:**

You don't need to read input or print anything. Your task is to complete the function **countNumbers()** which takes the integer **n **as input parameter and returns an integer denoting the answer.

**Expected Time Complexity:** O(N * number of digits in an integer)

**Expected Auxiliary Space:** O(1)

**Constraints:**

1 ≤ N ≤ 10^{5}

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Digits in a set

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