Geeksforgeeks

Error

Given a pattern containing only I's and D's. I for increasing and D for decreasing.

Devise an algorithm to print the minimum number following that pattern.

Digits from 1-9 and digits can't repeat.

Example 1:

Input:DOutput:21Explanation:D is meant for decreasing, So we choose the minimum number among 21,31,54,87,etc.

Example 2:

Input:IIDDDOutput:126543Explanation:Above example is self- explanatory, 1 < 2 < 6 > 5 > 4 > 3 I - I - D - D - D

**Your Task:**

You don't need to read input or print anything. Your task is to complete the function printMinNumberForPattern() which takes the string S and returns a string containing the minimum number following the valid pattern.

Expected Time Complexity: O(N)

Expected Auxiliary Space: O(1)

**Constraints:**

1 ≤ Length of String ≤ 8

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Number following a pattern

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