1663. Smallest String With A Given Numeric Value

https://leetcode.com/problems/smallest-string-with-a-given-numeric-value

Description

The numeric value of a lowercase character is defined as its position (1-indexed) in the alphabet, so the numeric value of a is 1, the numeric value of b is 2, the numeric value of c is 3, and so on.

The numeric value of a string consisting of lowercase characters is defined as the sum of its characters' numeric values. For example, the numeric value of the string "abe" is equal to 1 + 2 + 5 = 8.

You are given two integers n and k. Return the lexicographically smallest string with length equal to n and numeric value equal to k.

Note that a string x is lexicographically smaller than string y if x comes before y in dictionary order, that is, either x is a prefix of y, or if i is the first position such that x[i] != y[i], then x[i] comes before y[i] in alphabetic order.

Example 1:

**Input:** n = 3, k = 27
**Output:** "aay"
**Explanation:** The numeric value of the string is 1 + 1 + 25 = 27, and it is the smallest string with such a value and length equal to 3.

Example 2:

**Input:** n = 5, k = 73
**Output:** "aaszz"

Constraints:

• 1 <= n <= 105

• n <= k <= 26 * n

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